Analysis on variations of black soil water in Songnen Plain during ice and snow thawing periods
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Abstract:
On the basis of the field observat ion of black soil w ater dur ing the ice and snow thawing per iods, the v ariations o f to tal so il water co nt ent under fo ur different snow cov er conditio ns in the Song nen Plain w ere analy zed. The results show ed t hat the variatio n tendencies of to tal soil w ater content are differ ent under differ ent sur face conditions, especially in the so il lay er with the dept h o f 0~ 40 cm, and so il water var iatio n has obvio us r esponse time difference to the sur face co ndition. T he differ ence of so il water content between t he rev erse S2shaped moisture prof ile of snow cov ered soil and the r everse C2shaped moistur e pro file of bare so il ex isted in the soil layer below the depth of 140 cm. The r esear ch results can pro vide the scientific basis fo r the freez2 ing2thawing soil wat er contro l and manag ement in the black so il area of the Songnen Plain.
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