Simulation of land use–soil interactive effects on water and sediment yields at watershed scale

Wang, Xixi; Shang, Songhao; Yang, Wanhong; Clary, Calvin R.; Yang, Dawen

doi:10.1016/j.ecoleng.2008.11.011

Cited by 38 publications

(14 citation statements)

References 41 publications

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“…As a result, the shallow soils of alpine meadow allow new water to easily enter into the subsurface water. Therefore, alpine meadow coverage would increase the contributions of new rain to river water (Wang et al, 2010), as was found in our study. It is important to consider different vegetation coverage and its various hydrological functions in management of watersheds, especially in decreasing risk of flooding, as was described by toposequences of ecosystems resulting from climate and vegetation altitudinal zonation (Ambroise, 1995).…”

Section: Effects Of Topography P/aet and Vegetation Coverage On Contsupporting

confidence: 60%

Water isotope technology application for sustainable eco-environmental construction: Effects of landscape characteristics on water yield in the alpine headwater catchments of Tibetan Plateau for sustainable eco-environmental construction

Liu

Dorland

et al. 2015

Ecological Engineering

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Topography-climate-vegetation-runoff relationships are important issues in hydrological studies. In this paper, based on analyzing water isotope characteristics of river water, the influence of these variables on the relative contribution of rain to river water was investigated during one rain event in the Heishui Valley of the upper Yangtze River in China. During one rain event on August 19, 2005, a total number of 182 river water samples were collected at 13 sampling sites located along the principal river course and its tributaries. The analysis of water isotopes in the principal river course and its tributaries showed that new rain water and secondary evaporation precipitation caused great variation in values of dD and high d-excess increased with altitude. Based on calculations of two-component hydrograph separation using d 18 O, the results showed that the biggest relative contribution of new rain to river water (43%) was found in tributary B, while the smallest contribution (less than 5%) was found in tributary I. According to stepwise linear regression analysis, topography (elevation and slope) was the most important factor affecting the contributions of new rain to river water. When only vegetation variables were considered in the regression model, alpine shrub coverage proved to be negatively correlated with the contributions of new rain to river water, while alpine meadow coverage was positively correlated with the contributions of new rain. This would imply that increasing the relative coverage of alpine shrubs in this mountainous region of China may decrease the risk of flooding.

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Section: Effects Of Topography P/aet and Vegetation Coverage On Contsupporting

confidence: 60%

Water isotope technology application for sustainable eco-environmental construction: Effects of landscape characteristics on water yield in the alpine headwater catchments of Tibetan Plateau for sustainable eco-environmental construction

Liu

Dorland

et al. 2015

Ecological Engineering

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“…Choosing reasonable land-use patterns and suitable species are thus crucial because the shortage of water is a key factor. Using the Soil and Water Assessment Tool, Wang et al (2010a) suggested that the development of the best management practices for watershed health and sustainability may need to consider the interactive effects between land use and soil. Moreover, the restoration of vegetation on the CLP should also take into account that rainwater is the only source of water recharge for sustaining plant growth (Chen et al, 2007a).…”

Section: Aboveground Biomass Of C Korshinskii and Grasslandmentioning

confidence: 99%

Choosing an optimal land-use pattern for restoring eco-environments in a semiarid region of the Chinese Loess Plateau

Wang

Shao

Zhang

et al. 2015

Ecological Engineering

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A B S T R A C TThe natural environments in the semiarid regions of the Chinese Loess Plateau (CLP) are fragile due to the serious soil erosion and the weak ecological services of the plants. To ascertain and then evaluate a sustainable land-use pattern in these regions, we selected six typical land-use patterns (i.e., a farmland, a natural grassland, a homogeneous shrubland (S), a mix of shrubland and cultivated grassland (S-Alf), a mix of shrubland and orchard (S-O) and a mix of shrubland and grassland (S-G)) on the plateau and then measured the soil water, related soil properties and plant root indices to a depth of 1800 cm. We also measured the aboveground net primary productivities (ANPPs). The mean soil water content (SWC) within the 0-1800 cm profile was significantly highest (15.2%) in farmland, followed by grassland (11.4%) and S-Alf (8.0%). The available water (AW), the ratio between AW and AW capacity, and the thickness of the dried soil layers also demonstrated that farmland had the best conditions of soil water, followed by grassland and shrubland. The aboveground biomasses of grassland in both non-growing (140 g m À2 ) and growing (370 g m À2 ) seasons were significantly higher than those of shrublands. The ANPPs of the grassland (2.0 g m À2 d À1 ) demonstrated a similar trend. The patterns of land use (including the mixtures of different plant species) greatly affected the patterns of vertical distribution and quantities of soil water within the 1800-cm profile. The data for the soil-water regime and the ANPP further indicated that grassland would be an optimal use of the land for these semiarid regions. This information should be useful to the ecological scientists and policy makers for developing strategies for the sustainable management of vegetation on the CLP and possibly other water-limited regions around the world.

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“…Wang et al (2010) recommended fhat fhe land use-soil interactive effecfs should be considered fo develop fhe besf managemenf practices for improving watershed health and susfainabilify. Pease et al (2010) applied Annualized Agriculfural Nonpoint Source (AnnAGNPS) model to evaluate nonpoint source pollution in the Pipestem Creek watershed upstream of Pingree, North Dakota.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of spatial variability on hydrology and nutrient source loads at watershed scale using a modeling approach

Parajuli

2012

Hydrology Research

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Understanding the effects of spatial variabiiity on hydrologie parameters and nutrient source ioad distribution is essenfiai to develop water quality improvement programs. The objective of this research was fo evaluate spatially distributed hydrologie variabiiity, nutrient sources, and their ioadings at the watershed scaie using a modeling approach. The Soil and Water Assessment Tool (SWAT) was applied to assess spatial variability of annual average water, sediment total phosphorus (TP), and total nitrogen (TN) yields from the Upper Pearl River Watershed (UPRW) in Mississippi, USA. The SWAT model was successfully calibrated, validated, and verified with good model efficiency (R^ = 0.70 and E = 0.59) using monthly measured stream flow, daily observed flow, sediment, TP, and TN yields. The SWAT model results determined that spatial variability of annual average pollutant loads of water yield ranged from 877 to 206 mm, sediment yield ranged from 1.71 to 0.171 ha"'', TP ranged from 1.39 fo 0.02 kg ha~\ and TN ranged from 10.22 fo 0.69 kg ha"'' in the watershed subbasins. Understanding of the spatial variability of hydrologie and nutrient source loads distribution helps watershed managers focus their management efforts to the most needy watershed sub-basins.

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Simulation of land use–soil interactive effects on water and sediment yields at watershed scale

Cited by 38 publications

References 41 publications

Water isotope technology application for sustainable eco-environmental construction: Effects of landscape characteristics on water yield in the alpine headwater catchments of Tibetan Plateau for sustainable eco-environmental construction

Water isotope technology application for sustainable eco-environmental construction: Effects of landscape characteristics on water yield in the alpine headwater catchments of Tibetan Plateau for sustainable eco-environmental construction

Choosing an optimal land-use pattern for restoring eco-environments in a semiarid region of the Chinese Loess Plateau

Evaluation of spatial variability on hydrology and nutrient source loads at watershed scale using a modeling approach

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