黑龙江省冻融侵蚀分布及其特征

目的]探究黑龙江省冻融侵蚀分布及其特征,为黑土区农业可持续发展提供科学依据。方法]在对黑龙江省冻融侵蚀考察及影响因素分析的基础上,借鉴相关冻融侵蚀区分布界定方法以及层次分析法开展研究。结果]黑龙江省冻融侵蚀分布在131°—122°E,53°—48°N范围内,侵蚀面积为3.29×104 km2,占该区土地面积的11.98%。其中,轻度、中度、强烈、极强烈侵蚀面积分别占总侵蚀面积的21.78%,42.32%,23.78%,12.12%。侵蚀强度由北向南递减。结论]黑龙江省冻融侵蚀分布范围比较广,强度以中轻度为主;冻融侵蚀分布具有明显的地带性规律。

Distribution and Characteristics of Freeze-thaw Erosion in Heilongjiang Province

Objective] The distribution and charcteristics of freeze-thaw erosion in Heilongjiang Province were explored to provide basis for sustainable development of agriculture in black soil area. Methods] On the basis of investigation and analysis of influence factors of the freezing and thawing erosion of Heilongjiang Province, the distribution of freeze-thaw erosion was determined by method of analytic hierarchy process(AHP) and by referring other relevant research. Results] The scope of freeze-thaw erosion is in 131°-122°E, 53°-48°N in Heilongjiang Province. The erosion area is 3.29×10⁴ km², covering 11.98% of the total area of the province. Among them, areas of mild erosion, moderate erosion, strong erosion and extremely strong erosion accounted for 21.78%, 42.32%, 23.788% and 12.12%, respectively. Erosion intensity decrease from north to south. Conclusion] Freeze-thaw erosion distribute widely and had regional erosive intensity in Heilongjiang Province. The intensities of erosion are mainly moderate and mild.