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一、流域水土流失概况(一)水土流失概况黑龙江省七台河市四新小流域的土壤侵蚀类型以水力侵蚀为主,侵蚀形态为面蚀和沟蚀两种。该流域现有水土流失面积784.82hm2,占流域总面积的38.08%,其中轻度侵蚀410.58hm2,中度侵蚀307.12hm2,强度侵蚀67.12hm2,分别占水土流失面积的52.32%、39.13%、8.55%。流域内8条侵蚀沟占地面积0.9hm2,沟道总长度
I. Overview of Soil and Water Loss in the Basin (I) Overview of Soil and Water Loss Soil erosion in the four small watersheds of Qitaihe City, Heilongjiang Province is dominated by water erosion. The erosion forms are surface erosion and gully erosion. The existing soil erosion area of the basin is 784.82hm2, accounting for 38.08% of the total basin area, of which mild erosion is 410.58hm2, moderate erosion is 307.12hm2, and intensity erosion is 67.12hm2, accounting for 52.32%, 39.13% and 8.55% of the soil erosion area respectively. . The basin has 8 erosion ditches covering an area of 0.9hm2 and the total channel length