[1]LU Rui-jie,TANG Qing-liang,SANG Yan-li,et al.Dynamic Changes of Soil Moisture in Different Dunes of Ketu Sand Land in Qinghai Lake Basin[J].Research of Soil and Water Conservation,2012,19(02):111-115.
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Dynamic Changes of Soil Moisture in Different Dunes of Ketu Sand Land in Qinghai Lake Basin
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
19
Number of periods:
2012 02
Page number:
111-115
Column:
Public date:
2012-04-20
- Title:
- Dynamic Changes of Soil Moisture in Different Dunes of Ketu Sand Land in Qinghai Lake Basin
- Keywords:
- soil moisture; active dune; fixed dune; tempo-spaical change; rainfall
- CLC:
- S152.7
- DOI:
- -
- Abstract:
- In this paper,we selected three kinds of dunes in Ketu sand land on the east of Qinghai Lake,analyzed the soil moisture,as well as correlations between soil moisture and rainfall.The results show that:soil moisture in fixed dune has less variation along the profile,whereas the largest variation of soil moisture along the profile was observed in active dune with artificial measures (artificial vegetation and straw checkers).During the observation periods,soil moisture of the fixed dune was the highest in 0—80cm depth,followed by active dune,and active dune with artificial measures.The three kinds of dunes have similar temporal variation trends,which can be divided into three stages such as freezing stagnation period (from December to next March),compensation period (from April to July) and dehydration period (from August to November).Soil moisture is the highest in summer and autumn.The impact of precipitation on the upper soil is more significant,which mainly influences 60cm depth in the active dune with artificial measures,20cm depth in the fixed dune.In addition,our research suggests that the artificial vegetation and straw checkers can inhibit surface soil moisture evaporation,improve surface soil moisture and reduce wind erosion,which is quite important for the initial growth of vegetation before the dune is fixed.
- References:
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