降雨量、土壤蓄水量对流动沙地土壤水分深层渗漏的影响  

Relationship between precipitation and soil water storage and soil deep percolation in mobile sand land

作　　者：吴丽丽 刘丹一 杨文斌[1] 王涛 李卫[1] 冯金超 冯伟[4] Wu Lili;Liu Danyi;Yang Wenbin;Wang Tao;Li Wei;Feng Jinchao;Feng Wei(Institute of Desertification Studies,Chinese Academy of Forestry.Beijing 100091,China;China Sand Control and Sand Industry Society,Beijing 100714,China;Northwest Institute of Eco-Environtnent and Resources,Chinese Academy of Sciences,Lanzhou 730000,China;Xilingol Vocational College,Xilinhot 026000.Inner Mongolia,China)

机构地区：[1]中国林业科学研究院荒漠化研究所,北京100091 [2]中国治沙暨沙业学会,北京100714 [3]中国科学院西北生态环境资源研究院,甘肃兰州730000 [4]锡林郭勒职业学院,内蒙古锡林浩特026000

出　　处：《中国沙漠》2020年第3期210-218,共9页Journal of Desert Research

基　　金：中国林业科学研究院基本科研业务经费项目(CAFYBB2018MB011);内蒙古自治区自然科学基金项目(2017BS0316)

摘　　要：土壤水分深层渗漏是陆地近地层水分循环的重要环节。利用土壤水分深层渗漏记录仪对毛乌素沙地典型流动沙丘不同深度土层的土壤渗漏水量连续进行两年定点监测。结果表明:(1)2016年生长季(4月1日至10月31日)降水量为2017年的1.93倍,但50、100、200 cm沙层的渗漏水量分别是2017年同期的4.53、5.53、5.22倍。同时,渗漏水量与降雨量及土壤蓄水量的波峰较一致。(2)强降雨对深层渗漏水量的影响较大,土壤蓄水量的变化也与深层渗漏水量密切相关;降雨量较小时,土壤蓄水量与深层渗漏水量之间的关系更为密切。在连续降雨过程中,越往深处,渗漏的产生通常是多次降雨过程累积的结果,将土壤蓄水量作为中间变量,能更好地分析土壤深层渗漏过程。(3)当天蓄水量与次日渗漏水量的相关系数较高,土层越深,深层渗漏水量与土壤蓄水量的相关系数增加,二者之间的线性拟合的R^2也相应增加。Soil deep percolation is an important link of the water cycle in the near-terrestrial stratum,and it is one of the processes related to precipitation infiltration and groundwater recharge.In this study,the real-time monitoring of soil deep percolation of typical mobile sand land in Mu Us Sand Land was carried out by using the soil deep percolation recorder,the following conclusions were drawn:(1)The precipitation in the growing season of 2016(from April 1 to October 31)was 1.93 times of that in 2017,while the percolation of 50,100 and 200 cm sand layer were 4.53 times,5.53 times and 5.22 times of the same period in 2017.The variation range of soil water storage in 2016 was also significantly larger than that in 2017.There was a good correspondence between the percolation and the peaks of rainfall and soil water storage.(2)For heavy rainfall,rainfall had a greater impact on the amount of deep percolation,and the change of soil water storage was closely related to the amount of deep percolation;for less rainfall,the relationship between soil water storage and deep percolation was more close.In the process of continuous rainfall,because deep percolation had hysteresis and delayed response to rainfall,in the deeper soil layer,percolation was usually the result of the accumulation of multiple rainfall processes,Taking soil water storage as an intermediate variable can better analyze the process of deep percolation.(3)The correlation coefficient between the water storage and the percolation on the next day was higher.At the same time,the deeper the soil layer was,the higher the correlation coefficient between deep percolation and soil water storage was.The linear fitting effect between the two were not that ideal.

关 键 词：降雨量 土壤蓄水量 渗漏水量 深度 流动沙地 

分 类 号：S157[农业科学—土壤学]