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

Title:

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

Creator:

Zhang, Guanhua, Liu, Guobin, Yi, Liang, and Zhang, Pingcang

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:85daecb6-c228-437c-967f-6741f72fb9b9
uuid:85daecb6-c228-437c-967f-6741f72fb9b9
doi:10.2478/johh-2014-0035

Subject:

overland flow, Darcy-Weisbach friction coefficient, patch pattern, vegetation structure, simulated rainfall, and Loess Plateau

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

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.

Language:

Slovak

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

334-342

Source:

Journal of hydrology and hydromechanics | 2014 Volume:62 | Number:4

Harvested from:

CDK

Metadata only:

false