长春市饮水水源上游河流绿化情况的调查

Greening situation investigation on the rivers in the upper reaches of the drinking water sources of Changchun

长春市饮水水源上游河流的调查结果表明:影响长春市饮水水源的大小河流有20条,其中流域长度在15 km以上的有13条,其余的均在2～15 km之间。全区河流总长度为437.38 km,河流绿化的总长度为61.1 km,河流绿化率为13.96%。全区水土流失面积54 000 hm2,每年流失土壤167.34万t,每年流失到下游河道及水库的泥沙约225万t。建议用3 a时间把饮马河、双阳河及流入上述河流的20余条河流及水库周围全部绿化起来,确保长春市饮水水源的安全。

The investigation on the rivers in the upper reaches of the drinking water sources of Changchun showed that： there were 20 rivers effecting the drinking water sources in Changchun,there were 13 rivers basin length above 15 km,the others were between 2~15 km,The total length of the rivers was 437.38 km,the total length of the river greening was 61.1 km,and greening rate was 13.96%.The soil erosion area was 54 000 hm2,the amount of washed-away soil was 167.34 million tons every year,the sediment loss to downstream channel and reservoir was 225 million tons every year.This paper suggests that： spend 3 years to afforest the environment around the reservoirs and the Yinma river,ShuangYang river,so did more than 20 rivers which influx into Yinma river,ShuangYang river,that ensure the safety of drinking water source in Changchun city.