A method for estimating soil moisture storage in regions under water stress and storage depletion: a case study of Hai River Basin, North China

被引：19

作者：

Moiwo, Juana Paul ^{[1
]}

Yang, Yonghui ^{[1
]}

Han, Shumin ^{[1
]}

Lu, Wenxi ^{[2
]}

Yan, Nana ^{[3
]}

Wu, Bingfang ^{[3
]}

机构：

[1] Chinese Acad Sci, Key Lab Agr Water Resources, Agr Resources Res Ctr, Inst Genet & Dev Biol, Shijiazhuang 050021, Peoples R China

[2] Jilin Univ, Coll Environm & Resources, Changchun 130021, Jilin, Peoples R China

[3] Chinese Acad Sci, Inst Remote Sensing Applicat, Beijing 100101, Peoples R China

来源：

HYDROLOGICAL PROCESSES | 2011年 / 25卷 / 14期

关键词：

soil moisture; precipitation; irrigation; evapotranspiration; total water storage; LAND-SURFACE MODEL; PIEDMONT REGION; ENERGY-BALANCE; GROUNDWATER DEPLETION; TEMPORAL STABILITY; TAIHANG MOUNTAIN; RUNOFF DECLINE; GRACE; PLAIN; PRECIPITATION;

D O I：

10.1002/hyp.7991

中图分类号：

TV21 [水资源调查与水利规划];

学科分类号：

081501 ;

摘要：

Soil moisture is a consideration for soil conservation, agricultural production and climate modelling. This article presents a simple method for estimating soil moisture storage under water stress and storage depletion conditions. The method is driven by the common agro-hydrologic variables of precipitation (PPT), irrigation (IRR) and evapotranspiration (ET). The proposed method is successfully tested for the 152 000 km(2) floodplain region of Hai River Basin using 48 consecutive months (2003-2006) of data. Soil moisture data from global land data assimilation system/Noah land surface model are validated with ground-truth data from 102 soil moisture monitoring sites. The validated soil moisture is used in combination with in situ groundwater data to quantify total water storage change (TWSC) in the region. The estimated storage change is in turn compared with gravity recovery and climate experiment-derived TWSC for the study area. The soil moisture and TWSC terms show favourable agreements, with discrepancies of < 10% on the average. While there is no consistent seasonal trend in soil moisture, TWSC shows a strong seasonality. It is low in spring and high in summer. This trend corresponds with the IRR-PPT season in the study area. Change in groundwater and total water storage indicates storage depletion in the basin. Storage depletion in the region is driven mainly by groundwater IRR and ET loss. Despite the low PPT and high ET, there is narrowing seasonal trend in soil moisture. This is achieved at the expense of groundwater storage. IRR pumping has induced extensive groundwater depletion in the basin. It is therefore vital to develop cultivation strategies that aim at limiting IRR pumping and ET loss. Water management practices that not only reduce waste but also ensure high productivity and ecological sustainability could also mitigate storage depletion in the region. These measures could reduce further not only the seasonal trend in soil moisture but also that in groundwater storage. Copyright. (C) 2011 John Wiley & Sons, Ltd.

引用

页码：2275 / 2287

页数：13

共 66 条

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