Water Seepage and Its Dynamic Characteristics in Deep Layer of Typical Mobile Dune in Mu Us Sandland

doi:10.7522/j.issn.1000-694X.2017.00011

JOURNAL OF DESERT RESEARCH ›› 2017, Vol. 37 ›› Issue (2): 222-227.DOI: 10.7522/j.issn.1000-694X.2017.00011

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Water Seepage and Its Dynamic Characteristics in Deep Layer of Typical Mobile Dune in Mu Us Sandland

Yao Dongmei¹, Feng Jinchao², Feng Wei³, Liang Hairong⁴, Yang Wenbin², Dang Hongzhong², Wu Lili²

1. Tongliao Forest Park Management Office, Tongliao 028000, Inner Mongolia, China;
2. Institute of Desertification Studies, Chinese Academy of Forestry, Beijing 100091, China;
3. Xilingol Vocational College, Xilinhot 026010, Inner Mongalia, China;
4. Inner Mongolia Academy of Forestry, Hohhot 010010, China

Received:2016-11-17 Revised:2017-03-07 Online:2017-03-20 Published:2017-03-20

Abstract

Abstract: Water is the most important limiting factor in arid and semi-arid ecosystems, and has always been a research hotspot. However, due to the lack of measurement methods, the scientific explanation of the dynamic variation characteristics of water seepage in deep layer of mobile dunes still lacks convincing direct evidence. In this paper, the YWB-01 water seepage recorder was used to study the process of rainfall infiltration and the characteristics of deep seepage at the depth of 150 cm in mobile sand dune in Mu Us sandy land. The results showed that, from May 14, 2010 to July 14,2014, the number of days with ≤1 mm deep seepage was 793, and was 81.5% of the total observed seepage time, the deep seepage accounted for 21.3% of the total seepage volume. The number of days with ≥10 mm deep seepage was 18 days, and was 1.85% of the total observed seepage time, the deep seepage accounting for 33.3% of the total seepage volume. Concentrated supply period was mainly in June to September, the seepage accounted for more than 70% of the total annual seepage volume. There was a significant positive correlation between seepage and rainfall.

Key words: rainfall, seepage, moisture dynamic, mobile sand dune

CLC Number:

S152.7

Yao Dongmei, Feng Jinchao, Feng Wei, Liang Hairong, Yang Wenbin, Dang Hongzhong, Wu Lili. Water Seepage and Its Dynamic Characteristics in Deep Layer of Typical Mobile Dune in Mu Us Sandland[J]. JOURNAL OF DESERT RESEARCH, 2017, 37(2): 222-227.

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Water Seepage and Its Dynamic Characteristics in Deep Layer of Typical Mobile Dune in Mu Us Sandland

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