地理科学进展 ›› 2012, Vol. 31 ›› Issue (7): 853-858.doi: 10.11820/dlkxjz.2012.07.003

• 气候与水文过程 • 上一篇    下一篇

青海湖北土壤水分分布与土壤干层恢复

赵景波1,2, 祁子云1, 魏君平1, 邢闪1   

  1. 1. 陕西师范大学旅游与环境学院, 西安710062;
    2. 中国科学院地球环境研究所黄土与第四纪地质国家重点实验室, 西安710075
  • 收稿日期:2012-01-01 修回日期:2012-05-01 出版日期:2012-07-25 发布日期:2012-07-25
  • 作者简介:赵景波(1953-),男,山东滕州人,教授,博士生导师,主要从事第四纪与环境科学研究。E-mail:zhaojb@snnu.edu.cn
  • 基金资助:

    国家科技支撑计划项目(2007BAC30B01)。

Soil Moisture Distribution and Moisture Restoration in Dried Soil Layer in Northern Qinghai Lake

ZHAO Jingbo1,2, QI Ziyun1, WEI Junping1, XING Shan1   

  1. 1. College of Tourism and Environment, Shaanxi Normal University, Xi′an 710062, China;
    2. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi′an 710075, China
  • Received:2012-01-01 Revised:2012-05-01 Online:2012-07-25 Published:2012-07-25

摘要: 通过对青海湖北沙柳河镇土壤含水量的测定, 研究了该区土壤水分含量和土壤干层恢复等问题。结果表明:青海湖北沙柳河镇土壤含水量随着深度的增加而减少, 在年降水量略多于400 mm的条件下, 多数土壤干层中的水分得到了恢复, 干层消失, 少数土壤还有干层存在。在2009 年降水增多, 到2011 年土壤水分恢复深度达到了1.3 m, 2011 年土壤含水量显著高于2009 年。在年降水量为410 mm左右的条件下, 土壤干层恢复到1.3 m深度需要的时间为2 年左右。该区土壤水分运移缓慢, 干层恢复比黄土高原缓慢, 恢复的深度较小, 这主要是该区土壤冻结期较长等决定的。土壤干层中水分的恢复表明, 该区2009年以来草原土壤水分输出量略小于输入量。

关键词: 恢复过程, 恢复深度, 青海湖, 沙柳河镇, 水分平衡, 土壤干层

Abstract: According to the determination of soil moisture content at Shaliuhe town in the northern Qinghai lake, this paper researches problems of the soil moisture content and the recovery of dried soil layer. Results show that with the increase of depth, the content of soil water decreases in Shaliuhe town, when the annual precipitation was slightly more than 400 mm, the moisture content of most dried soil layers recovered, dried soil layers disappeared, but there still existed few dried soil layers. After 2009, the year of the precipitation increase, the recovery of soil moisture reached 1.3 m depth in 2011. In 2011 the content of soil water was significantly higher than that in 2009. When the annual precipitation was about 410 mm, the recovery of soil moisture that reached 1.3 m depth needs about two years. The water movement is slow in this area, so the recovery of dried soil layer needs significantly longer time than that on the Loess Plateau, and the depth of soil moisture recovery is smaller, which is mainly determined by the longer soil freezing period. The recovery of soil moisture shows that the output of water was slightly less than the input from 2009 till now in this area.

Key words: dried soil layer, Qinghai Lake, recovery depth, recovery procedure, Shaliuhe town, water balance