News Release on Soil Erosion Research: September-2018

Earth Movers: Humans Cause Most Erosion

Human activity causes ten times a lot of eroding than all natural processes combined, in step with a replacement study. And it has been that method for an extended time.

People are the most reason for erosion on continental surfaces since early within the 1st millennium, says Bruce Sir Geoffrey Wilkinson, University of Michigan man of science.

Wilkinson used existing figures natural erosion amounts to regarding sixty feet each one million years. [1]

Experimental investigation of sandy loam soil erosion on a 45-degree slope under the effect of groundwater flow

Groundwater flow is taken into account as a serious contributor for erosion which will lead to landslides of natural hill slopes and shallow and planted failures of designed embankments. during this study, erosion mechanisms of a sandy soil slope, thanks to groundwater flow were investigated employing a three-dimensional physical model. For this purpose, associate erosion flume with dimensions of a hundred cm long, fifty cm wide and sixty cm high was created within the laboratory. The physical slope model with a forty-five degrees slope angle was compacted in a pair of.5 cm lifts to get a uniform sandy soil slope. The groundwater flow was generated below a piezometric head of fifty cm-water that was applied at the water reservoir situated at one finish of the erosion flume. [2]

Mapping soil erosion in the Da Dang river basin, Lam Dong province

The public prosecutor Dang geographical area, set within the higher a part of Dong Nai watercourse, plays a vital role to shield water resources within the downstream components. the aim of this study is to assess and develop an eroding map within the public prosecutor Dang geographical area by victimization the Revised Universal Soil Loss Equation (RUSLE) combined with remote sensing (RS) and Geographic data system (GIS). The factors employed in the RUSLE equation (R, K, LS, C, and P) were computed by victimization information obtained from native meteoric stations, geography maps, soil surveys, and satellite pictures. the info on water quality (TSS) of seventy-five surface water samples was deployed at fifteen watching sites within the geographical area within the amount of 2012 – 2016, provided by DONRE of Lam Dong. The results showed that fourteen.41% of the basin space is subjected to a high erosion rate with Associate in Nursing extent of ten tons/ha/year or additional. what is more, the study additionally indicated that toxic shock concentration features a close correlation with land use practices and therefore the spatial distribution of eroding. [3]

Soil erosion constraints on global agricultural productivity potential

Land degradation poses a threat to food security significantly in developing economies wherever the pace of agricultural development is fast and wherever wearing mitigation efforts square measure usually lacking. wearing from agricultural lands ends up in the loss of soil fertility and simultaneous changes to soil geophysical science that together cut back the potential for crop yields. wearing is controlled by a range of things as well as agricultural management, climate, soil properties, and website characteristics however the relative importance of those factors at a worldwide scale stay poorly quantified. Moreover, there square measure variety of uncertainties concerning the additive impacts of abrasion on agricultural productivity and restricted understanding of the relative importance of soil hydrologic and biogeochemical changes on potential crop yields. Here, we stock out a series of multi-decadal model simulations of abrasion and crop yields beneath a range of climate, soil, crop, slope gradient, and management situations. [4]

Vulnerability Assessment of Soil Erosion Based on Topography and Vegetation Cover in a Developing City of Orlu L.G.A, South East Nigeria

the drawback of abrasion has over time been exacerbated by the event and constructions of buildings, roads, poor system and different urban characters on areas transiting from rural to urban setting. This study kicked off to gauge the vulnerability of Orlu L.G.A., Nigeria, to erosion in the face of augmented anthropogenetic activities employing a combination of the Geographic system (GIS) and soil characteristics. Soil samples were collected and analyzed for geotechnical/physical properties, the slope was conjointly measured. Satellite pictures wherever analyzed for changes in land use and land cowl, whereas GPS coordinates of various points within the space were obtained and interpolated into a map to make digital elevation model (DEM). [5]

Reference

[1] Earth Movers: Humans Cause Most Erosion

By Live Science Staff, November 3, 2004, 07:45 am ET (web link)

[2] Experimental investigation of sandy loam soil erosion on a 45-degree slope under the effect of groundwater flow

Akay O. Experimental investigation of sandy loam soil erosion on a 45-degree slope under the effect of groundwater flow. Pamukkale University Journal of Engineering Sciences.;1000(1000):0-. (web link)

[3] Mapping soil erosion in the Da Dang river basin, Lam Dong province

Pham H, Le Vo P, Van Le T. Mapping soil erosion in the Da Dang river basin, Lam Dong province. Science & Technology Development Journal-Science of The Earth & Environment. 2017 Dec 31;1(M2):47-56. (web link)

[4] Soil erosion constraints on global agricultural productivity potential

Jang WS, Neff J, Herrick J, Doro L. Soil erosion constraints on global agricultural production potential. InEGU General Assembly Conference Abstracts 2018 Apr (Vol. 20, p. 10743). (web link)

[5] Vulnerability Assessment of Soil Erosion Based on Topography and Vegetation Cover in a Developing City of Orlu L.G.A, South East Nigeria

  1. C. Iwuji1*, O. L. Iroh1, J. D. Njoku2, S. O. Anyanwu3, G. T. Amangabara1 and K. O. E. Ukaegbu1

1Department of Environmental Technology, Federal University of Technology, Owerri, Nigeria.

2Department of Urban and Regional Planning, Federal University of Technology, Owerri, Nigeria.

3Department of Geography and Environmental Management, Imo State University, Owerri, Nigeria. (web link)

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