作　　者： (唐丽芳）;

机构地区： 福建省水土保持试验站,福建福州350003

出　　处： 《亚热带水土保持》 2017年第3期28-31,共4页

摘　　要： 对汀江流域长汀段1972~2014年共43年实测资料统计、分析,结果表明:汀江长汀段降雨量主要集中在3~6和8月间,径流和输沙量也集中在这段时间,反映了该流域水沙年内分配一致性的特点;汀江长汀段径流和输沙量都有显著的上升和下降波动,突变年份并不完全一致,相同的是在2000年后,径流和输沙都有明显的下降趋势;对水土流失治理前后期的年均水沙变化及相同降水条件下水土流失治理前后期的水沙变化分析表明,水土保持对流域水沙影响较大,做好水土保持可以减少输沙量。 It was counted and analyzed the measured data in 43 years （from 1972 to 2014） of Changting Section of Tingjiang River. The results show that,the precipitation, runoff and sediment discharge in Changting Section of Tingjiang River mainly concentrated in the March to June and August. It reflects the consistency between the annual runoff and sediment distribution in this watershed. Both the runoff and sediment discharge in Changting Section of Tingjiang River appear the obvious fluctuation of rise and fall. While the year of mutation is not entirely consistent. The consistency started from Year 2000, both runoff and sediment discharge appeared obvious downward trend. The a-nalysis was conducted on the annual average runoff and sediment variation before and after the soil conservation. In addition ,the analysis was also conducted on the runoff and sediment variation before and after soil conservation under the same precipitation conditions. The results show that, soil conservation has great impact on the runoff and sediment discharge in this watershed. Thus the soil conservation will reduce the sediment discharge.

关 键 词： 水土流失治理 水沙变化 长汀