Specifications

Soil andWaterConservation, ChineseAcademy of Sciences, No. 26 Xinong Rd., YangLing, Shaanxi
712100, China
3 Xian Univ. of Technology, No. 5 South Jinhua, Xian, Shaanxi 710048, China
4 Key Laboratory for Ecological Agriculture of Ministry of Agriculture, South China Agricultural
Univ., Wushan Rd. 483, Tianhe District,Guangzhou, Guangdong 510642, China
5 Dept. of Biosystems Engineering and Soil Science, Institute for a Secure and Sustainable
Environment, Center for Environmental Biotechnology, Univ. of Tennessee, TN 37996-4143,
United States
Corresponding author: Wang, Q. ([e-mail])
Source title: Journal of Hydrologic Engineering
Abbreviated source title: J. Hydrol. Eng.
Volume: 18
Issue: 4
Issue date: 2013
Publication year: 2013
Pages: 465-473
Language: English
ISSN: 10840699
Document type: Journal article (JA)
Publisher: American Society of Civil Engineers (ASCE), 1801 Alexander Graham Bell Drive,
Reston, VA 20191-4400, United States
Abstract: Water flushing was applied to different land use plots on Loess slopes to examine
the effect of land use changes on flow hydraulics and the transport of soil surface solutes in
erosion. The runoff and movement of sediment and soil solutes were analyzed in relation to land
use and scouring flow. Flow experiments were conducted with five land use treatments:
abandoned land (Salsola ruthenica), alfalfa land (Medicago sativa), corn land, scrub land
(Caragana intermedia), and bare land. The results show that at the same scouring time, the
cumulative sediment yields with different land use types are: bare land > corn land > Caragana
intermedia land > abandoned land > alfalfa land. The unit sediment loads are similar to this
modulus of the cumulative sediment yields. The pre-experimental water contents of the soil
profile exerted a greater effect on the content of soil moisture and its distribution on the slope
than that of the antecedent solute contents in the field experiment conditions for different land
use types. The land use types also affected the surface transport of soil solute. The bromide
concentrations in runoff were in the order of: bare land > corn land > alfalfa land > Caragana
intermedia land > abandoned land. The nitrate concentrations in runoff with different land use
types had no obvious orderliness. However, the nitrate concentration was lineally related to the
bromide concentration, as expressed by CNO-3 = 3.01CBr-+28.35 (R2 = 0.90). © 2013 American
Society of Civil Engineers.
Number of references: 48
Main heading: Runoff
Controlled terms: Erosion - Hydraulics - Land use - Sediments - Soil
moisture - Solute transport
Uncontrolled terms: Different land use types - Field experiment - Flow
experiments - Flow hydraulics - Loess - Nitrate concentration - Soil erosion - Surface