Spatial and Temporal Variability of Water Availability in the Yellow River Basin  

作　　者：LI Ming-Xing MA Zhu-Guo 

机构地区：[1]Key Laboratory of Regional Climate-Environment Research for Temperate East Asia,Institute of Atmospheric Physics,Chinese Academy of Sciences

出　　处：《Atmospheric and Oceanic Science Letters》2013年第4期191-196,共6页大气和海洋科学快报（英文版）

基　　金：supported by the National Basic Research Program of China (973 Program,2012CB956202);the National Key Technology R&D Program of China(2012BAC22B04);the National Natural Science Foundation of China (41105048);the Special Fund for Meteorological scientific Research in the Public Interest (GYHY201106028)

摘　　要：The changes in hydrological processes in the Yellow River basin were simulated by using the Community Land Model(CLM,version 3.5),driven by historical climate data observed from 1951 to 2008.A comparison of modeled soil moisture and runoff with limited observations in the basin suggests a general drying trend in simulated soil moisture,runoff,and precipitation-evaporation balance(P-E) in most areas of the Yellow River basin during the observation period.Furthermore,annual soil moisture,runoff,and P-E averaged over the entire basin have declined by 3.3%,82.2%,and 32.1%,respectively.Significant drying trends in soil moisture appear in the upper and middle reaches of the basin,whereas a significant trend in declining surface runoff and P-E occurred in the middle reaches and the southeastern part of the upper reaches.The overall decreasing water availability is characterized by large spatial and temporal variability.The changes in hydrological processes in the Yellow River basin were simulated by using the Community Land Model （CLM, version 3.5）, driven by historical climate data observed from 1951 to 2008. A comparison of modeled soil moisture and runoff with limited observations in the basin suggests a general drying trend in simulated soil moisture, runoff, and precipitation-evaporation balance （P-E） in most areas of the Yellow River basin during the observation period. Furthermore, annual soil moisture, runoff, and P-E averaged over the entire basin have declined by 3.3%, 82.2%, and 32.1%, respectively. Significant drying trends in soil moisture appear in the upper and middle reaches of the basin, whereas a signifi- cant trend in declining surface runoff and P-E occurred in the middle reaches and the southeastern part of the upper reaches. The overall decreasing water availability is characterized by large spatial and temporal variability.

关 键 词：water availability VARIABILITY the Yellow River basin 

分 类 号：P333[天文地球—水文科学]