Effects of vegetation restoration on the spatial distribution of soil moisture at the hillslope scale in semi-arid regions

Yang, Lei; Chen, Liding; Wei, Wei

doi:10.1016/j.catena.2014.09.014

Cited by 58 publications

(29 citation statements)

References 39 publications

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“…The spatio-temporal variability of soil moisture regulates many hydrological processes (Famiglietti et al, 1998). Characterizing soil moisture variations across a range of spatial and temporal scales is fundamental to understand and model eco-hydrological processes because of the complex and nonlinear relationships among various biophysical processes and soil moisture (Famiglietti et al, 1998;Yang et al, 2015). Exploring the soil moisture variation at regional scale is a key issue for the eco-hydrology research in water-limited regions such as the Loess Plateau in China.…”

Section: Introductionmentioning

confidence: 99%

Soil Moisture Variations with Land Use along the Precipitation Gradient in the North–South Transect of the Loess Plateau

Wang

et al. 2016

Land Degrad Dev

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Knowledge of soil moisture spatial variation with land use along the precipitation gradient is necessary to improve land management and guide restoration practice in the water‐limited Chinese Loess Plateau. This study selected 45 sampling points at 11 sites across the north–south transect of the Loess Plateau based on the precipitation gradient and land use. Results showed that the vertical profiles of soil moisture revealed large variations with the precipitation gradient changing, especially in the surface layer (0–100 cm). Significant linear correlation existed between the average soil moisture of the profile and the mean annual precipitation (MAP) for each land use type (p < 0·05). Hereinto, the soil moisture under the grassland was affected more greatly by precipitation. The soil moisture under each land use commonly revealed the trend as farmland > grassland > shrubland > woodland, while it might be higher under the woodland than the shrubland in the surface layer in regions with MAP <500 mm. The soil moisture of woodland or shrubland at the selected points was below or approximate to the permanent wilting point in regions with MAP <520 mm. Covariance analysis confirmed the effects of land use and MAP on the soil moisture in depth of 100–300 cm, and it showed land use did not pose significant effects in the surface layer. In addition, our study indicated that it is necessary to reconsider and re‐evaluate the current vegetation restoration strategy in the perspective of vegetation sustainability and soil water availability, in which woodland and shrubland were selected on a large scale in the arid and semi‐arid regions. Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 99%

Soil Moisture Variations with Land Use along the Precipitation Gradient in the North–South Transect of the Loess Plateau

Wang

et al. 2016

Land Degrad Dev

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“…These annual averages were derived from meteorological data provided by a meteorological station located 0.6 km from the watershed and represent the averages of 45 years (1961-2006Yang et al, 2015). The study site is a typical hilly region with gullies and elevations ranging from 1,937 to 2,151 m. The area is located in a semiarid temperate zone with an annual mean temperature of 6.8°C and annual mean precipitation of 386 mm.…”

Section: Site Descriptionmentioning

confidence: 99%

Evaluating canopy transpiration and water use of two typical planted tree species in the dryland Loess Plateau of China

et al. 2017

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Large-scale vegetation restoration has been conducted in China's Loess Plateau over the past several decades to control soil and water loss. However, these efforts have not followed any specific guidelines to select plant species that balance the twin goals of vegetation restoration and water demand. In the present study, we measured canopy transpiration characteristics of oriental arborvitae (Platycladus orientalis) and Chinese pine (Pinus tabulaeformis), two species that are commonly planted in restoration efforts, and recorded water input and output for these two species during the growing season. P. tabulaeformis had a higher tolerance than P. orientalis to warmer and drier environments and used water over a wider time span. Canopy transpiration significantly increased when rainfall exceeded 15 mm and was negatively correlated with net change of soil water content. Meanwhile, rainless intervals also affected canopy transpiration recovery. Canopy transpiration of P. tabulaeformis was 25.4% higher than that of P. orientalis. Soil water content under P. orientalis declined by 28.4% after the growing season, while it slightly increased under P. tabulaeformis (0.7%). Our results suggested that although P. tabulaeformis plantation had higher canopy transpiration, this water use did not drastically reduce soil water content, mainly due to the lower evaporation caused by the dense canopy cover. However, the low soil water content also implied that a better management, such as a mixed plantation of these two species and other supplemental water-conservation techniques, should be considered to better use water in this semiarid region.

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“…Additional, soil moisture and soil temperature are closely related to some meteorological factors, including solar radiation (SR; Xiaoning Song et al, 2013), evaporation (Sorman & Abdulrazzak, 2010), and precipitation (Koster et al, 2004). Research on soil moisture and soil temperature mostly concentrate on their spatial distribution patterns (Kim & Singh, 2014;Yang et al, 2015), evolution trend with time (Albergel et al, 2013;Sheffield & Wood, 2010), and their relationship with other environmental and factors (Che et al, 2018;Ding et al, 2017;Green et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Long‐Range Correlation Analysis of Soil Temperature and Moisture on A'rou Hillsides, Babao River Basin

et al. 2018

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Studying the tendency of soil temperature and moisture can provide scientific support for setting soil parameters for land surface hydrological model. Previous research has shown that there is long‐range correlation of soil temperature or moisture; however, driving factors of long‐range correlation variations and the cross correlation between temperature and moisture under multiple timescales have rarely been discussed. To explore the driving factors, we compared long‐range correlation between shady and sunny slopes. Adaptive fractal analysis was utilized to analyze long‐range cross correlation (LRCC) and long‐range correlation (LRC). Experimental data were collected between 9 August 2013 and 3 December 2014 at A'rou observation stations, Babao River Basin. Results show that two slopes have some common characteristics. (1) Soil temperature and moisture display the consistent change. (2) The persistence intensity of moisture, temperature, and their interaction intensity change at 9, 6, and 6‐day timescales, respectively. (3) LRC and LRCC indices demonstrate the stratification heterogeneity. Results also show that LRC and LRCC indices on two slopes have differences. The soil system was stratified into three layers to explain these differences over large timescales. (1) At 4‐ to 20‐cm depth, with significant influence of solar radiation and evapotranspiration on sunny slope, moisture shows weaker persistence. There is stronger antipersistence of temperature and stronger hydrothermal interaction on sunny slope. (2) At 20‐ to 80‐cm depth, there is weaker persistence of soil moisture on shady slope because of unstable groundwater and side runoff supply. (3) At 80‐ to 160‐cm depth, with seasonal melt‐water effect on sunny slope, persistence of moisture was considerably weaker.

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Effects of vegetation restoration on the spatial distribution of soil moisture at the hillslope scale in semi-arid regions

Cited by 58 publications

References 39 publications

Soil Moisture Variations with Land Use along the Precipitation Gradient in the North–South Transect of the Loess Plateau

Soil Moisture Variations with Land Use along the Precipitation Gradient in the North–South Transect of the Loess Plateau

Evaluating canopy transpiration and water use of two typical planted tree species in the dryland Loess Plateau of China

Long‐Range Correlation Analysis of Soil Temperature and Moisture on A'rou Hillsides, Babao River Basin

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