【摘要】 黄土高原是我国主要的水土流失区 ,也是西部生态环境建设的重点地区。过去几十年的建设取得了很大的成绩 ,但也存在着严重问题 ,其中没有充分考虑水资源的限制作用及植树造林对有限水资源的大量消耗 ,无疑是一个重要方面。根据黄土高原地区 4 1个气象台站 196 1～ 1990年的月降水总量资料 ,分析了黄土高原地区多年平均年降水量、年内各个季节的降水分配、年降水变率和离差系数等的分布特征 ,以及光热水的耦合特征 ,并在此基础上 ,探讨了黄土高原地区植被生态建设中与水资源有关的几个问题更多还原

【Abstract】 Loess Plateau is the main region of soil and water loss and the key region of western eco environmental construction in China. During the past decades, a great deal of achievements and some severe problems are both existed. Among the problems, no consideration in full of the restriction of water resources and the much consumption of water resources in tree planting are no doubt the important aspects.Based on monthly precipitation data of 41 weather observation stations in Loess Plateau from 1961 to 1990, some characteristics of the regional precipitation resources, including spatial distribution of annual precipitation, seasonal distribution and inter annual change, and coupling with radiation and heat resources, are analyzed. At last, the great problems related to water resources about vegetation eco construction are put forward.更多还原