自然资源学报 ›› 2001, Vol. 16 ›› Issue (5): 427-432.doi: 10.11849/zrzyxb.2001.05.005

• 论文 • 上一篇    下一篇

黄土高原森林植被对陆地水循环影响的研究

李玉山   

  1. 中国科学院、水利部、西北农林科技大学水土保持研究所, 陕西杨凌 712100
  • 收稿日期:2001-03-23 修回日期:2001-05-21 出版日期:2001-10-25 发布日期:2001-10-25
  • 作者简介:李玉山(1932-),男,江苏江都人,研究员,研究方向为土壤水分与土壤生态。
  • 基金资助:

    国家自然科学重大基金项目“我国北方地区农业生态系统水分运行及区域分异规律研究”(49890330)资助.

Effects of forest on water circle on the Loess Plateau

LI Yu shan   

  1. Institute of Soil and Water Conservation, CAS, MWR, Northwest Sci Tech University of Agriculture and Forestry Yangling 712100
  • Received:2001-03-23 Revised:2001-05-21 Online:2001-10-25 Published:2001-10-25

摘要: 论文从土壤水文学科视角来研究和分析黄土高原森林水文作用的两个重大问题,即对总径流量和对地下水转化的影响。联系黄土高原与水循环有关的生态属性,系统阐述了林地土壤下伏干层的发现、分布、水文性质及其生物学成因。重点分析了干层因其巨大水分亏缺量阻隔重力水下渗,阻止降水垂直入渗补给地下水的作用。指出森林因其显著拦蓄径流作用,蓄积水分又难以转化为地下水,因而具有减少林地出境总径流量的作用。

关键词: 黄土高原, 森林, 水循环, 干层

Abstract:  From the research results on soil hydrology, the effects of forest hydrology on the total runoff and the surface water transferred into ground water were analyzed.It was found out that there exits an underlying drying layer of soil underneath forestland at a depth of more than 1 to 3 m from the soil surface.The distribution of the drying layer and causes why it exits are expounded, as related to ecological attributes of the Loess Plateau. It was believed that the drying layer is in great water deficit caused by evapotranspiration,which prevents gravitational infiltration of water and the replenishment of ground water.It is determined that a forestland on the Loess Plateau reduces the total runoff as the results of the increased retention of runoff and of the reduced recharged into ground water.

Key words: forest, Loess Plateau, water circle, dry layer

中图分类号: 

  • S715.3