A.土壤侵蝕模數(shù)[t/(m2·A.] B.土壤容許流失量[t/(m2·A.] C.土壤侵蝕模數(shù)[t/(km2·A.] D.植被覆蓋度(mm)
A.輕度侵蝕 B.中度侵蝕 C.強(qiáng)度侵蝕 D.極強(qiáng)度侵蝕
A.70~50,2~10,200~2500 B.50~30,10~25,2500~5000 C.10~30,25~50,5000~8000 D.<10,50~100,8000~15000