塔里木河下游植被生态需水量(英文)

编号 zgly0001586139

文献类型 期刊论文

文献题名 塔里木河下游植被生态需水量(英文)

作者 叶朝霞  陈亚宁  李卫红 

作者单位 KeyLaboratoryofOasisEcologyandDesertEnvironment  XinjiangInstituteofEcologyandGeography 

母体文献 Journal of Geographical Sciences 

年卷期 2010年02期

年份 2010 

分类号 Q948 

关键词 ecologicalwaterdemand  naturalvegetation  eco-hydrologicalprocesses  TarimRiver 

文摘内容 We have appraised the relationships between soil moisture,groundwater depth, and plant species diversity in the lower reaches of the Tarim River in western China,by analyzing field data from 25 monitoring wells across eight study sites and 25 permanent vegetation survey plots.It is noted that groundwater depth,soil moisture and plant species diversity are closely related.It has been proven that the critical phreatic water depth is five meters in the lower reaches of the Tarim River.We acquired the mean phreatic evaporation of different groundwater levels every month by averaging the two results of phreatic evaporation using the Qunk and Averyanov formulas.Based on different vegetation types and acreage with different groundwater depth,the total ecological water demand(EWD)of natural vegetation in 2005 was 2.4×108m 3in the lower reaches of the Tarim River.Analyzing the monthly EWD,we found that the EWD in the growth season(from April to September)is 81%of the year’s total EWD.The EWD in May,June and July was 47%of the year’s total EWD,which indicates the best time for dispensing artificial water.This research aims at realizing the sustainable development of water resources and provides a scientific basis for water resource management and sound collocation of the Tarim River Basin.