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Well over half the sediment lost from many watersheds originates as eroded soil from their uplands and bottomlands. Such erosion occurs over such a large area that it often goes unnoticed in comparison to the more spectacular losses from stream channels and gullies, yet it may be an even greater sediment source. Upland erosion is sometimes noticeable when rilling occurs at serious rates, but the 'unseen' interrill erosion, caused primarily by raindrop impact on land between rills and gullies, may also produce great quantities of sediment. This research was conducted to study interrill erosion rates for the major soils and land uses in Goodwin Creek Watershed by applying hundreds of simulated rainstorms on many different soils and cropping conditions. The transport of sediment was studied for various conditions that are typical of intensively cropped land to evaluate how much sediment would be carried from the sources to the major stream systems. The capacity of runoff to transport sediment was affected most by the steepness of the runoff flow channel. Steepnesses exceeding 1% could transport large quantities of sediment. Transport capacity also increased rapidly as flow rate increased and as sediment size decreased. This research confirms that Goodwin Creek Watershed soils are very erodible and that the resulting sediment is readily transported.

Well over half the sediment lost from many watersheds originates as eroded soil from their uplands and bottomlands. Such erosion occurs over such a large area that it often goes unnoticed in comparison to the more spectacular losses from stream channels and gullies, yet it may be an even greater sediment source. Upland erosion is sometimes noticeable when rilling occurs at serious rates, but the 'unseen' interrill erosion, caused primarily by raindrop impact on land between rills and gullies, may also produce great quantities of sediment. This research was conducted to study interrill erosion rates for the major soils and land uses in Goodwin Creek Watershed by applying hundreds of simulated rainstorms on many different soils and cropping conditions. The transport of sediment was studied for various conditions that are typical of intensively cropped land to evaluate how much sediment would be carried from the sources to the major stream systems. The capacity of runoff to transport sediment was affected most by the steepness of the runoff flow channel. Steepnesses exceeding 1% could transport large quantities of sediment. Transport capacity also increased rapidly as flow rate increased and as sediment size decreased. This research confirms that Goodwin Creek Watershed soils are very erodible and that the resulting sediment is readily transported.

Well over half the sediment lost from many watersheds originates as eroded soil from their uplands and bottomlands. Such erosion occurs over such a large area that it often goes unnoticed in comparison to the more spectacular losses from stream channels and gullies, yet it may be an even greater sediment source. Upland erosion is sometimes noticeable when rilling occurs at serious rates, but the 'unseen' interrill erosion, caused primarily by raindrop impact on land between rills and gullies, may also produce great quantities of sediment. This research was conducted to study interrill erosion rates for the major soils and land uses in Goodwin Creek Watershed by applying hundreds of simulated rainstorms on many different soils and cropping conditions. The transport of sediment was studied for various conditions that are typical of intensively cropped land to evaluate how much sediment would be carried from the sources to the major stream systems. The capacity of runoff to transport sediment was affected most by the steepness of the runoff flow channel. Steepnesses exceeding 1% could transport large quantities of sediment. Transport capacity also increased rapidly as flow rate increased and as sediment size decreased. This research confirms that Goodwin Creek Watershed soils are very erodible and that the resulting sediment is readily transported.

Well over half the sediment lost from many watersheds originates as eroded soil from their uplands and bottomlands. Such erosion occurs over such a large area that it often goes unnoticed in comparison to the more spectacular losses from stream channels and gullies, yet it may be an even greater sediment source. Upland erosion is sometimes noticeable when rilling occurs at serious rates, but the 'unseen' interrill erosion, caused primarily by raindrop impact on land between rills and gullies, may also produce great quantities of sediment. This research was conducted to study interrill erosion rates for the major soils and land uses in Goodwin Creek Watershed by applying hundreds of simulated rainstorms on many different soils and cropping conditions. The transport of sediment was studied for various conditions that are typical of intensively cropped land to evaluate how much sediment would be carried from the sources to the major stream systems. The capacity of runoff to transport sediment was affected most by the steepness of the runoff flow channel. Steepnesses exceeding 1% could transport large quantities of sediment. Transport capacity also increased rapidly as flow rate increased and as sediment size decreased. This research confirms that Goodwin Creek Watershed soils are very erodible and that the resulting sediment is readily transported.

This report summarizes the results of 42 laboratory Jet Erosion Tests performed on Plexiglas tube samples obtained from the Lower American River (LAR) between River Mile (RM) 6.0 and RM 10.0. The results from these tests will be used by the U.S. Army Corps of Engineers, Sacramento District, in assessments of the erosion resistance of the LAR from increases in discharge from 115,000 cfs to 160,000 cfs from Folsom Dam. The test specimens were obtained from 22, 4 in.-diam Plexiglas tube samples. The variations in values of the measured erosion parameters may have been caused by variations in the materials for some of the tested samples (i.e., when the material changed from silt/sand to clay). However, the variations in results for many of the samples were due to changes in the quality of samples. The resulting values of Erodibility Coefficient, Kd, and Critical Stress, c, are very useful information in assessing the erodibility of riverbanks as well as the river bed itself. Because of the observed natural variability of the materials, combining the erosion parameters presented in this report with the drilling logs and local geology will provide beneficial results for assessing the stability of the LAR.

This report summarizes the results of 42 laboratory Jet Erosion Tests performed on Plexiglas tube samples obtained from the Lower American River (LAR) between River Mile (RM) 6.0 and RM 10.0. The results from these tests will be used by the U.S. Army Corps of Engineers, Sacramento District, in assessments of the erosion resistance of the LAR from increases in discharge from 115,000 cfs to 160,000 cfs from Folsom Dam. The test specimens were obtained from 22, 4 in.-diam Plexiglas tube samples. The variations in values of the measured erosion parameters may have been caused by variations in the materials for some of the tested samples (i.e., when the material changed from silt/sand to clay). However, the variations in results for many of the samples were due to changes in the quality of samples. The resulting values of Erodibility Coefficient, Kd, and Critical Stress, c, are very useful information in assessing the erodibility of riverbanks as well as the river bed itself. Because of the observed natural variability of the materials, combining the erosion parameters presented in this report with the drilling logs and local geology will provide beneficial results for assessing the stability of the LAR.

This report summarizes the results of 42 laboratory Jet Erosion Tests performed on Plexiglas tube samples obtained from the Lower American River (LAR) between River Mile (RM) 6.0 and RM 10.0. The results from these tests will be used by the U.S. Army Corps of Engineers, Sacramento District, in assessments of the erosion resistance of the LAR from increases in discharge from 115,000 cfs to 160,000 cfs from Folsom Dam. The test specimens were obtained from 22, 4 in.-diam Plexiglas tube samples. The variations in values of the measured erosion parameters may have been caused by variations in the materials for some of the tested samples (i.e., when the material changed from silt/sand to clay). However, the variations in results for many of the samples were due to changes in the quality of samples. The resulting values of Erodibility Coefficient, Kd, and Critical Stress, c, are very useful information in assessing the erodibility of riverbanks as well as the river bed itself. Because of the observed natural variability of the materials, combining the erosion parameters presented in this report with the drilling logs and local geology will provide beneficial results for assessing the stability of the LAR.

The most complete, nonpartisan source of information on this hot agronomic topic available today, this book brings together a diverse group of papers and data to resolve the debate between sedimentologists and soil scientists and agronomists over whether the effects of soil erosion on carbon and atmospheric CO2 is beneficial or destructive. Divided into four sections, it offers data on how soil erosion affects soil, water, and air quality. Topics include mineralization rate, inundation, sediment deposition, and global warming potential, as well as carbon dioxide, methane, and nitrous oxide emissions, and the implications of soil erosion on the global carbon cycle and carbon budget.

The most complete, nonpartisan source of information on this hot agronomic topic available today, this book brings together a diverse group of papers and data to resolve the debate between sedimentologists and soil scientists and agronomists over whether the effects of soil erosion on carbon and atmospheric CO2 is beneficial or destructive. Divided into four sections, it offers data on how soil erosion affects soil, water, and air quality. Topics include mineralization rate, inundation, sediment deposition, and global warming potential, as well as carbon dioxide, methane, and nitrous oxide emissions, and the implications of soil erosion on the global carbon cycle and carbon budget.

A mathematical model for evaluating on-site soil erosion

A Study of Soil Erosion and Sediment Production Rates on Selected Forestry Operations in North Carolina

"5208. Severe soil erosion on Colorado River in Arizona, on former BLM land. Now known as 'Grand' Canyon, because of depth of erosion. Note squirrel in frames 3 and 4. Grand Canyon."

Document from Tamil Nadu Legislative Assembly Digital Archive

Document from Tamil Nadu Legislative Assembly Digital Archive

Issued July 1975, replaces 1969 ed. Kept up-to-date by revised and supplementary sheets. Includes bibliographical references

24 l

24 l

24 l

Originally published 1951, rev. May 1953

5 pages

Issued Sept. 1953

'SOIL EROSION DUE TO MAHANADI RIVER IN ORISSA (24-Feb-2003)' from the Parliament Digital Library

Historical series (Canada. Dept. of Agriculture)

Historical series (Canada. Dept. of Agriculture)

Historical series (Canada. Dept. of Agriculture)

Historical series (Canada. Dept. of Agriculture)

This article takes Zhaoyang District, Zhaotong City, Yunnan Province, as the study area. By obtaining basic data such as rainfall, soil texture data, digital elevation, land use, and remote sensing images, the RUSLE model is used to estimate the soil erosion modulus in Zhaoyang. Based on this, the soil erosion classification and soil erosion of different land use types in the study area are analyzed. The results have shown that the soil erosion intensity in Zhaoyang, shows a pattern of increasing from southeast to northwest. Most of the land is subject to slight erosion, followed by mild and moderate erosion. The strongly eroded soil is concentrated in the northwest and is greatly affected by altitude and slope factors. The proportion of soil micro erosion is 64.4%, the proportion of mild erosion area is 17.58%, the proportion of moderate erosion area is 11.99%, and the proportion of strong erosion, extremely strong erosion, and severe erosion area are 3.74%, 1.55%, and 0.74%, respectively. The erosion amount of land use types such as construction land and water bodies is very small, and overall it is at a micro erosion level. Shrubs, forests, and grasslands are the main sources of regional erosion, and the soil erosion intensity of cultivated land is high.

Well over half the sediment lost from many watersheds originates as eroded soil from their uplands and bottomlands. Such erosion occurs over such a large area that it often goes unnoticed in comparison to the more spectacular losses from stream channels and gullies, yet it may be an even greater sediment source. Upland erosion is sometimes noticeable when rilling occurs at serious rates, but the 'unseen' interrill erosion, caused primarily by raindrop impact on land between rills and gullies, may also produce great quantities of sediment. This research was conducted to study interrill erosion rates for the major soils and land uses in Goodwin Creek Watershed by applying hundreds of simulated rainstorms on many different soils and cropping conditions. The transport of sediment was studied for various conditions that are typical of intensively cropped land to evaluate how much sediment would be carried from the sources to the major stream systems. The capacity of runoff to transport sediment was affected most by the steepness of the runoff flow channel. Steepnesses exceeding 1% could transport large quantities of sediment. Transport capacity also increased rapidly as flow rate increased and as sediment size decreased. This research confirms that Goodwin Creek Watershed soils are very erodible and that the resulting sediment is readily transported.

Assessing the effects of vegetation and precipitation on soil erosion in the Three-River Headwaters Region of the Qinghai-Tibet Plateau, China 作者： HE,Qian 1 DAI,Xiao'ai 1 CHEN,Shiqi 2 作者单位： 1. College of Earth Science, Chengdu University of Technology, Chengdu 610059, China 2. College of Foreign Languages and Cultures, Chengdu University of Technology, Chengdu 610059, China 通讯作者： DAI,Xiao'ai Email:[email protected] 提交时间： 2020-11-25 摘要: Soil erosion in the Three-River Headwaters Region (TRHR) of the Qinghai-Tibet Plateau in China has a significant impact on local economic development and ecological environment. Vegetation and precipitation are considered to be the main factors for the variation in soil erosion. However, it is a big challenge to analyze the impacts of precipitation and vegetation respectively as well as their combined effects on soil erosion from the pixel scale. To assess the influences of vegetation and precipitation on the variation of soil erosion from 2005 to 2015, we employed the Revised Universal Soil Loss Equation (RUSLE) model to evaluate soil erosion in the TRHR, and then developed a method using the Logarithmic Mean Divisia Index model (LMDI) which can exponentially decompose the influencing factors, to calculate the contribution values of the vegetation cover factor (C factor) and the rainfall erosivity factor (R factor) to the variation of soil erosion from the pixel scale. In general, soil erosion in the TRHR was alleviated from 2005 to 2015, of which about 54.95% of the area where soil erosion decreased was caused by the combined effects of the C factor and the R factor, and 41.31% was caused by the change in the R factor. There were relatively few areas with increased soil erosion modulus, of which 64.10% of the area where soil erosion increased was caused by the change in the C factor, and 23.88% was caused by the combined effects of the C factor and the R factor. Therefore, the combined effects of the C factor and the R factor were regarded as the main driving force for the decrease of soil erosion, while the C factor was the dominant factor for the increase of soil erosion. The area with decreased soil erosion caused by the C factor (12.10×103 km2) was larger than the area with increased soil erosion caused by the C factor (8.30×103 km2), which indicated that vegetation had a positive effect on soil erosion. This study generally put forward a new method for quantitative assessment of the impacts of the influencing factors on soil erosion, and also provided a scientific basis for the regional control of soil erosion. soil erosion vegetation cover rainfall erosivity Logarithmic Mean Divisia Index quantitative assessment Three-River Headwaters Region 分类： 地球科学 >> 地理学 引用： ChinaXiv:202011.00127 (或此版本 ChinaXiv:202011.00127V1 ) doi:10.12074/202011.00127 CSTR:32003.36.ChinaXiv.202011.00127.V1 推荐引用方式： HE,Qian,DAI,Xiao'ai,CHEN,Shiqi.(2020).Assessing the effects of vegetation and precipitation on soil erosion in the Three-River Headwaters Region of the Qinghai-Tibet Plateau, China.干旱区科学.[ChinaXiv:202011.00127] 版本历史 [V1] 2020-11-25 13:19:35 ChinaXiv:202011.00127V1 下载全文

'Soil Erosion in Rajasthan (26-Nov-1991)' from the Parliament Digital Library

81 leaves :

'SOIL EROSION DUE TO GANGA RIVER (15-Dec-2003)' from the Parliament Digital Library

Government Publishing Office U.S. Congress House of Representatives Committee on Natural Resources H.R. _, RESTORING HEALTHY FORESTS FOR HEALTHY COMMUNITIES ACT; H.R. 1294, SELF-SUFFICIENT COMMUNITIES LAND ACT; H.R. 818, HEALTHY FOREST MANAGEMENT AND WILDFIRE PREVENTION ACT; H.R. 1345, CATASTROPHIC WILDFIRE PREVENTION ACT OF 2013; H.R. _, DEPLETING RISK FROM INSECT INFESTATION, SOIL EROSION, AND CATASTROPHIC FIRE ACT OF 2013; AND H.R. 1442, DEPLETING RISK FROM INSECT INFESTATION, SOIL EROSION, AND CATASTROPHIC FIRE ACT OF 2013. Date(s) Held: 2013-04-11 113th Congress, 1st Session GPO Document Source: CHRG-113hhrg80441 Superintendents of Documents ID: Y 4.R 31/3 Witnesses: Brandt, Hon. Skip, Commissioner, Idaho County, Idaho Campbell, Hon. Ray, Commissioner, Okanogan County, Washington Prepared statement on H.R. _, (Hastings) Dozier, Hon. Cindy, Commissioner, Hinsdale County, Colorado Groseta, Andy, Public Lands Council, Arizona Cattle Growers' Association Horngren, Scott, Staff Attorney, American Forest Resource Council Prepared statement on H.R. _, (Hastings) Kulakowski, Dominik, Ph.D., Assistant Professor, School of Geography, Adjunct Assistant Professor, Department of Biology, Clark University Maisch, John ''Chris,'' State Forester & Director, Alaska Department of Natural Resources, Division of Forestry Martin, Hon. John, County Commissioner, Garfield County, Colorado Martin, Tommie, District 1 Supervisor and Vice Chair, Gila County, Arizona Morris, Judy, Supervisor, District 2, Trinity County, California Prepared statement on H.R. _, (Hastings) Robertson, Hon. Doug, Commissioner, Douglass County, Oregon Prepared statement on H.R. _, (DeFazio, Schrader, Walden) Schrader, Hon. Kurt, a Representative in Congress from the State of Oregon Prepared statement on H.R. _, (DeFazio, Schrader, Walden) Sibold, Jason S., Ph.D., Assistant Professor of Geography, Department of Anthropology, Colorado State University Tidwell, Hon. Tom, Chief, Forest Service, U.S. Department of Agriculture Prepared statement on H.R. 818, H.R. 1294, and H.R. 1345 Tuchmann, Tom, Forestry and Conservation Finance Advisor, Office of Governor John A. Kitzhaber Prepared statement of Governor John A. Kitzhaber, MD, on H.R. _, (DeFazio, Schrader, Walden) Walden, Hon. Greg, a Representative in Congress from the State of Oregon Prepared statement on H.R. _, (DeFazio, Schrader, Walden) Wood, Justin, Vice President, Fish Construction, NW, Inc., on behalf of the National Association of Home Builders, Prepared statement on H.R. _, (Hastings) Related Items: United States House Bill 818 (113th Congress) United States House Bill 818 (113th Congress) United States House Resolution 818 (113th Congress) United States House Bill 1294 (113th Congress) United States House Bill 1294 (113th Congress) United States House Bill 1345 (113th Congress) United States House Bill 1345 (113th Congress) United States House Bill 1354 (113th Congress) United States House Bill 1442 (113th Congress) United States House Bill 1442 (113th Congress) U.S. Code: 5 U.S.C. 533 U.S. Code: 5 U.S.C. 551 U.S. Code: 5 U.S.C. 552b(c) U.S. Code: 16 U.S.C. 500 U.S. Code: 43 U.S.C. 1181a Public Law 105-83 Public Law 110-343 Congressional Serial No. 113-9

Government Publishing Office U.S. Congress House of Representatives Committee on Natural Resources H.R. _, RESTORING HEALTHY FORESTS FOR HEALTHY COMMUNITIES ACT; H.R. 1294, SELF-SUFFICIENT COMMUNITIES LAND ACT; H.R. 818, HEALTHY FOREST MANAGEMENT AND WILDFIRE PREVENTION ACT; H.R. 1345, CATASTROPHIC WILDFIRE PREVENTION ACT OF 2013; H.R. _, DEPLETING RISK FROM INSECT INFESTATION, SOIL EROSION, AND CATASTROPHIC FIRE ACT OF 2013; AND H.R. 1442, DEPLETING RISK FROM INSECT INFESTATION, SOIL EROSION, AND CATASTROPHIC FIRE ACT OF 2013. Date(s) Held: 2013-04-11 113th Congress, 1st Session GPO Document Source: CHRG-113hhrg80441 Superintendents of Documents ID: Y 4.R 31/3 Witnesses: Brandt, Hon. Skip, Commissioner, Idaho County, Idaho Campbell, Hon. Ray, Commissioner, Okanogan County, Washington Prepared statement on H.R. _, (Hastings) Dozier, Hon. Cindy, Commissioner, Hinsdale County, Colorado Groseta, Andy, Public Lands Council, Arizona Cattle Growers' Association Horngren, Scott, Staff Attorney, American Forest Resource Council Prepared statement on H.R. _, (Hastings) Kulakowski, Dominik, Ph.D., Assistant Professor, School of Geography, Adjunct Assistant Professor, Department of Biology, Clark University Maisch, John ''Chris,'' State Forester & Director, Alaska Department of Natural Resources, Division of Forestry Martin, Hon. John, County Commissioner, Garfield County, Colorado Martin, Tommie, District 1 Supervisor and Vice Chair, Gila County, Arizona Morris, Judy, Supervisor, District 2, Trinity County, California Prepared statement on H.R. _, (Hastings) Robertson, Hon. Doug, Commissioner, Douglass County, Oregon Prepared statement on H.R. _, (DeFazio, Schrader, Walden) Schrader, Hon. Kurt, a Representative in Congress from the State of Oregon Prepared statement on H.R. _, (DeFazio, Schrader, Walden) Sibold, Jason S., Ph.D., Assistant Professor of Geography, Department of Anthropology, Colorado State University Tidwell, Hon. Tom, Chief, Forest Service, U.S. Department of Agriculture Prepared statement on H.R. 818, H.R. 1294, and H.R. 1345 Tuchmann, Tom, Forestry and Conservation Finance Advisor, Office of Governor John A. Kitzhaber Prepared statement of Governor John A. Kitzhaber, MD, on H.R. _, (DeFazio, Schrader, Walden) Walden, Hon. Greg, a Representative in Congress from the State of Oregon Prepared statement on H.R. _, (DeFazio, Schrader, Walden) Wood, Justin, Vice President, Fish Construction, NW, Inc., on behalf of the National Association of Home Builders, Prepared statement on H.R. _, (Hastings) Related Items: United States House Bill 818 (113th Congress) United States House Bill 818 (113th Congress) United States House Resolution 818 (113th Congress) United States House Bill 1294 (113th Congress) United States House Bill 1294 (113th Congress) United States House Bill 1345 (113th Congress) United States House Bill 1345 (113th Congress) United States House Bill 1354 (113th Congress) United States House Bill 1442 (113th Congress) United States House Bill 1442 (113th Congress) U.S. Code: 5 U.S.C. 533 U.S. Code: 5 U.S.C. 551 U.S. Code: 5 U.S.C. 552b(c) U.S. Code: 16 U.S.C. 500 U.S. Code: 43 U.S.C. 1181a Public Law 105-83 Public Law 110-343 Congressional Serial No. 113-9

Government Publishing Office U.S. Congress House of Representatives Committee on Natural Resources H.R. _, RESTORING HEALTHY FORESTS FOR HEALTHY COMMUNITIES ACT; H.R. 1294, SELF-SUFFICIENT COMMUNITIES LAND ACT; H.R. 818, HEALTHY FOREST MANAGEMENT AND WILDFIRE PREVENTION ACT; H.R. 1345, CATASTROPHIC WILDFIRE PREVENTION ACT OF 2013; H.R. _, DEPLETING RISK FROM INSECT INFESTATION, SOIL EROSION, AND CATASTROPHIC FIRE ACT OF 2013; AND H.R. 1442, DEPLETING RISK FROM INSECT INFESTATION, SOIL EROSION, AND CATASTROPHIC FIRE ACT OF 2013. Date(s) Held: 2013-04-11 113th Congress, 1st Session GPO Document Source: CHRG-113hhrg80441 Superintendents of Documents ID: Y 4.R 31/3 Witnesses: Brandt, Hon. Skip, Commissioner, Idaho County, Idaho Campbell, Hon. Ray, Commissioner, Okanogan County, Washington Prepared statement on H.R. _, (Hastings) Dozier, Hon. Cindy, Commissioner, Hinsdale County, Colorado Groseta, Andy, Public Lands Council, Arizona Cattle Growers' Association Horngren, Scott, Staff Attorney, American Forest Resource Council Prepared statement on H.R. _, (Hastings) Kulakowski, Dominik, Ph.D., Assistant Professor, School of Geography, Adjunct Assistant Professor, Department of Biology, Clark University Maisch, John ''Chris,'' State Forester & Director, Alaska Department of Natural Resources, Division of Forestry Martin, Hon. John, County Commissioner, Garfield County, Colorado Martin, Tommie, District 1 Supervisor and Vice Chair, Gila County, Arizona Morris, Judy, Supervisor, District 2, Trinity County, California Prepared statement on H.R. _, (Hastings) Robertson, Hon. Doug, Commissioner, Douglass County, Oregon Prepared statement on H.R. _, (DeFazio, Schrader, Walden) Schrader, Hon. Kurt, a Representative in Congress from the State of Oregon Prepared statement on H.R. _, (DeFazio, Schrader, Walden) Sibold, Jason S., Ph.D., Assistant Professor of Geography, Department of Anthropology, Colorado State University Tidwell, Hon. Tom, Chief, Forest Service, U.S. Department of Agriculture Prepared statement on H.R. 818, H.R. 1294, and H.R. 1345 Tuchmann, Tom, Forestry and Conservation Finance Advisor, Office of Governor John A. Kitzhaber Prepared statement of Governor John A. Kitzhaber, MD, on H.R. _, (DeFazio, Schrader, Walden) Walden, Hon. Greg, a Representative in Congress from the State of Oregon Prepared statement on H.R. _, (DeFazio, Schrader, Walden) Wood, Justin, Vice President, Fish Construction, NW, Inc., on behalf of the National Association of Home Builders, Prepared statement on H.R. _, (Hastings) Related Items: United States House Bill 818 (113th Congress) United States House Bill 818 (113th Congress) United States House Resolution 818 (113th Congress) United States House Bill 1294 (113th Congress) United States House Bill 1294 (113th Congress) United States House Bill 1345 (113th Congress) United States House Bill 1345 (113th Congress) United States House Bill 1354 (113th Congress) United States House Bill 1442 (113th Congress) United States House Bill 1442 (113th Congress) U.S. Code: 5 U.S.C. 533 U.S. Code: 5 U.S.C. 551 U.S. Code: 5 U.S.C. 552b(c) U.S. Code: 16 U.S.C. 500 U.S. Code: 43 U.S.C. 1181a Public Law 105-83 Public Law 110-343 Congressional Serial No. 113-9

Book Source: Digital Library of India Item 2015.51467 dc.contributor.author: Venkatakrishnan, L Ed. dc.date.accessioned: 2015-06-29T12:49:32Z dc.date.available: 2015-06-29T12:49:32Z dc.date.copyrightexpirydate: 0000-00-00 dc.date.digitalpublicationdate: 2005-09-08 dc.date.citation: 1948 dc.identifier.barcode: 4990010256919 dc.identifier.origpath: /data4/upload/0109/631 dc.identifier.copyno: 1 dc.identifier.uri: http://www.new.dli.ernet.in/handle/2015/51467 dc.description.scanningcentre: C-DAK, Kolkata dc.description.main: 1 dc.description.tagged: 0 dc.description.totalpages: 287 dc.format.mimetype: application/pdf dc.language.iso: English dc.publisher.digitalrepublisher: Digital Library Of India dc.publisher: Government Press, Madras dc.source.library: Tra Library, Jorhat dc.subject.classification: Geography dc.subject.classification: Exploration dc.subject.classification: Soil dc.subject.keywords: Weathering dc.subject.keywords: Mass Wasting dc.title: Soil Erosion

"References": p. 369-386

Pinyon-Juniper woodlands dominate approximately 24.3 million hectares (60 million acres) in the western United States. The overall objective was to test the sensitivity of the LANDSAT Thematic Mapper (TM) spectral data for detecting varying degrees of soil erosion within the Pinyon-Juniper woodlands. A second objective was to assess the potential of the spectral data for assigning the Universal Soil Loss Equation (USLE) crop management (C) factor values to varying cover types within the woodland. Thematic Mapper digital data for June 2, 1984 on channels 2, 3, 4, and 5 were used. Digital data analysis was performed using the ELAS software package. Best results were achieved using CLUS, an unsupervised clustering algorithm. Fifteen of the 40 Pinyon-Juniper signatures were identified as being relatively pure Pinyon-Juniper woodland. Final analysis resulted in the grouping of the 15 signatures into three major groups. Ten study sites were selected from each of the three groups and located on the ground. At each site the following field measurements were taken: percent tree canopy and percent understory cover, soil texture, total soil loss, and soil erosion rate estimates. A technique for measuring soil erosion within Pinyon-Juniper woodlands was developed. A theoretical model of site degradation after Pinyon-Juniper invasion is presented.

'Prevention of Soil Erosion/Barren Land (27-Nov-1996)' from the Parliament Digital Library

'Prevention of Soil Erosion/Barren Land (27-Nov-1996)' from the Parliament Digital Library

Rainfall induced landslides and soil erosion are part of a complex system of multiple interacting processes, and both are capable of significantly affecting sediment budgets. These sediment mass movements also have the potential to significantly impact on a broad network of ecosystems health, functionality and the services they provide. To support the integrated assessment of these processes it is necessary to develop reliable modelling architectures. This paper proposes a semi-quantitative integrated methodology for a robust assessment of soil erosion rates in data poor regions affected by landslide activity. It combines heuristic, empirical and probabilistic approaches. This proposed methodology is based on the geospatial semantic array programming paradigm and has been implemented on a catchment scale methodology using Geographic Information Systems (GIS) spatial analysis tools and GNU Octave. The integrated data-transformation model relies on a modular architecture, where the information flow among modules is constrained by semantic checks. In order to improve computational reproducibility, the geospatial data transformations implemented in ESRI ArcGis are made available in the free software GRASS GIS. The proposed modelling architecture is flexible enough for future transdisciplinary scenario analysis to be more easily designed. In particular, the architecture might contribute as a novel component to simplify future integrated analyses of the potential impact of wildfires or vegetation types and distributions, on sediment transport from water induced landslides and erosion.

Well over half the sediment lost from many watersheds originates as eroded soil from their uplands and bottomlands. Such erosion occurs over such a large area that it often goes unnoticed in comparison to the more spectacular losses from stream channels and gullies, yet it may be an even greater sediment source. Upland erosion is sometimes noticeable when rilling occurs at serious rates, but the 'unseen' interrill erosion, caused primarily by raindrop impact on land between rills and gullies, may also produce great quantities of sediment. This research was conducted to study interrill erosion rates for the major soils and land uses in Goodwin Creek Watershed by applying hundreds of simulated rainstorms on many different soils and cropping conditions. The transport of sediment was studied for various conditions that are typical of intensively cropped land to evaluate how much sediment would be carried from the sources to the major stream systems. The capacity of runoff to transport sediment was affected most by the steepness of the runoff flow channel. Steepnesses exceeding 1% could transport large quantities of sediment. Transport capacity also increased rapidly as flow rate increased and as sediment size decreased. This research confirms that Goodwin Creek Watershed soils are very erodible and that the resulting sediment is readily transported.

Well over half the sediment lost from many watersheds originates as eroded soil from their uplands and bottomlands. Such erosion occurs over such a large area that it often goes unnoticed in comparison to the more spectacular losses from stream channels and gullies, yet it may be an even greater sediment source. Upland erosion is sometimes noticeable when rilling occurs at serious rates, but the 'unseen' interrill erosion, caused primarily by raindrop impact on land between rills and gullies, may also produce great quantities of sediment. This research was conducted to study interrill erosion rates for the major soils and land uses in Goodwin Creek Watershed by applying hundreds of simulated rainstorms on many different soils and cropping conditions. The transport of sediment was studied for various conditions that are typical of intensively cropped land to evaluate how much sediment would be carried from the sources to the major stream systems. The capacity of runoff to transport sediment was affected most by the steepness of the runoff flow channel. Steepnesses exceeding 1% could transport large quantities of sediment. Transport capacity also increased rapidly as flow rate increased and as sediment size decreased. This research confirms that Goodwin Creek Watershed soils are very erodible and that the resulting sediment is readily transported.

The process of soil erosion as the central focus of soil and water conservation studies in sustainable ecosystems is influenced by various natural and human disturbances. Besides, the overall structure and composition of an ecosystem are affected by changes in its landscape. Therefore, the present study was planned to investigate the relationship between landscape metrics and soil erosion patterns in the KoozehTopraghi Watershed located in Ardabil Province. In this regard, the 14 landscape metrics including Patch Density (PD), Largest Patch Index (LPI), Total Edge (TE), Edge Density (ED), Landscape Shape Index (LSI), Mean Patch Area (AREA-MN),  Mean Euclidean Nearest Neighbor Distance (END-MN), Landscape Division Index (DIVISION), Mean Patch Shape Index (SHAPE-MN), Splitting Index (SPLIT), Patch Cohesion Index (COHESION ), Effective Mesh Size (MESH), Aggregation Index (AI) and Percentage of Landscape (PLAND) were calculated using Fragstats 4.2.1 Software. Then, the severity of soil erosion in the study area was estimated using the Erosion Potential Method (EPM), which its performance has been confirmed by previous studies around the study area. Then, the results of landscape metrics and soil erosion calculation were interred to IBM SPSS Statistics software platform, and the established regression models were determined. The results indicate an inverse relationship between DIVISION, ED, and LPI landscape metrics with the specific soil erosion and a direct relationship between SHAPE-MN and AREA-MN with specific soil erosion of the KoozehTopraghi Watershed. The results of the present study confirm the different behavioral patterns of land features as a result of land degradation processes. These results can be used in effective and sound planning of land use management at watershed and landscape scales.  

Includes references

Rivers are characterized by their water flow regime and sediment transport. Sediments are crucial for channel morphology, water quality, providing habitat for aquatic organisms and, finally, for sustaining deltas. Rivers are, however, fragmented by dams and will face an additional building boom due to actions to mitigate climate change (with hydropower) and water scarcity. Reservoir siltation is a serious challenge for reservoir management but also entails downstream morphological impacts. However, sediment entrapment is an often neglected element in reservoir planning and environmental assessment. The aim of this study thus is to give an overview on the links between soil erosion and sediment entrapment in reservoirs, its degree on a global scale (reservoirs lose annually 1% of their capacity), the driving factors that influence associated processes and the different approaches for reservoir management to reduce siltation and its impacts downstream.

July 25 & 26, 2018. Hosted at Tainted Creek Watershed Farmer Council. This footage is provided by the community therefore the views and opinions expressed do not represent the views and opinions held by Vernon Communications Cooperative. Any businesses or individuals shown are not necessarily affiliated with Vernon Communications Cooperative.

'Effect of soil Erosion in Agricultural Produce (17-Dec-1998)' from the RS Debates Digital Library

9 pages