Effects of patterned Artemisia capillaris on overland flow resistance under varied rainfall intensities in the Loess Plateau of China

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Title:Effects of patterned Artemisia capillaris on overland flow resistance under varied rainfall intensities in the Loess Plateau of China
Creators:
Zhang, Guanhua; Department of Soil and Water Conservation, Changjiang River Scientific Research Institute, Wuhan, Hubei 430010, China.
Liu, Guobin; gbliu at ms dot iswc dot ac dot cn; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China.
Yi, Liang; Hubei Academy of Environmental Sciences, Wuhan, Hubei 430072, China.
Zhang, Pingcang; Department of Soil and Water Conservation, Changjiang River Scientific Research Institute, Wuhan, Hubei 430010, China.
Journal or Publication Title:
Journal of Hydrology and Hydromechanics, 62, 4, pp. 334-342
Uncontrolled Keywords:overland flow, Darcy-Weisbach friction coefficient, patch pattern, vegetation structure, simulated rainfall, Loess Plateau

Abstract

In this paper simulated rainfall experiments in laboratory were conducted to quantify the effects of patchy distributed Artemisia capillaris on spatial and temporal variations of the Darcy-Weisbach friction coefficient (f). Different intensities of 60, 90, 120, and 150 mm h–1 were applied on a bare plot (CK) and four different patched patterns: a checkerboard pattern (CP), a banded pattern perpendicular to slope direction (BP), a single long strip parallel to slope direction (LP), and a pattern with small patches distributed like the letter ‘X’ (XP). Each plot underwent two sets of experiments, intact plant and root plots (the above-ground parts were removed). Results showed that mean f for A. capillaris patterned treatments was 1.25–13.0 times of that for CK. BP, CP, and XP performed more effectively than LP in increasing hydraulic roughness. The removal of grass shoots significantly reduced f. A negative relationship was found between mean f for the bare plot and rainfall intensity, whereas for grass patterned plots fr (mean f in patterned plots divided by that for CK) increased exponentially with rainfall intensity. The f –Re relation was best fitted by a power function. Soil erosion rate can be well described using f by a power-law relationship.

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Title:Effects of patterned Artemisia capillaris on overland flow resistance under varied rainfall intensities in the Loess Plateau of China
Translated title:Effects of patterned Artemisia capillaris on overland flow resistance under varied rainfall intensities in the Loess Plateau of China
Creators:
Zhang, Guanhua; Department of Soil and Water Conservation, Changjiang River Scientific Research Institute, Wuhan, Hubei 430010, China.
Liu, Guobin; gbliu at ms dot iswc dot ac dot cn; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China.
Yi, Liang; Hubei Academy of Environmental Sciences, Wuhan, Hubei 430072, China.
Zhang, Pingcang; Department of Soil and Water Conservation, Changjiang River Scientific Research Institute, Wuhan, Hubei 430010, China.
Uncontrolled Keywords:overland flow, Darcy-Weisbach friction coefficient, patch pattern, vegetation structure, simulated rainfall, Loess Plateau
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Mathematics, Physics and Earth Sciences > Institute of Hydrodynamics > Journal of Hydrology and Hydromechanics
Journal or Publication Title:Journal of Hydrology and Hydromechanics
Volume:62
Number:4
Page Range:pp. 334-342
ISSN:0042-790X
Publisher:Institute of Hydrology of the Slovak Academy of Sciences and the Institute of Hydrodynamics of the Academy of Sciences of the Czech Republic
Related URLs:
URLURL Type
http://avi.lib.cas.cz/node/55Publisher
ID Code:8356
Item Type:Article
Deposited On:08 Jan 2015 18:41
Last Modified:08 Jan 2015 17:41

Citation

Zhang, Guanhua; Liu, Guobin; Yi, Liang; Zhang, Pingcang (2014) Effects of patterned Artemisia capillaris on overland flow resistance under varied rainfall intensities in the Loess Plateau of China. Journal of Hydrology and Hydromechanics, 62 (4). pp. 334-342. ISSN 0042-790X

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