摘要
过去确定黄河流域水土流失重点治理区主要采用来沙分配图法和多沙粗沙模数指标法,这两种万法都需用到粗泥沙资料,由于有泥沙颗分资料的测站较少,故其精度有限.根据河龙区间7～8月份水流平均含沙量300kg/m^3的指标,在含沙量分布图上确定出重点治理区,该万法只涉及全沙资料,而有全沙资料的站网控制密度相对比有粗泥沙资料的站网控制密度耍大得多,因此其精度也就高得多.黄河流域重点治理区为11.3万km^2,其中河龙区间为5.7万km^2,泾洛渭河为3.2万km^2,祖厉河、苦水河为2.4万km^2,河龙区间的5.7万km^2是重点中的重点.
There were two ways, distribution graphs of sediment yield and muddy and coarse sediment modulus index, applied for determining the key harnessing regions of soil and water loss in the Yellow River basin, both of them needed coarse sediment data. There have been limited accuracy of the ways because there are less stations with sediment particle-size analysis data. The way applied in the paper is determining the key harnessing areas on sediment charge distribution map according to the average sediment charge index of 300 kg/m^(3) in July to August in the water of Hekouzheng to Longmen reach, which is only related to total-load sediment data and of much higher accuracy because there is larger station net density controlling under the stations with total-load sediment data than that controlling under the stations with coarse sediment data. The results shows that there are 113 thousand km^(2) of key harnessing areas in the Yellow River basin, in which there are 57 thousands km^(2) in the region of Hekouzheng to Longmen that is the focal in all the key areas, 32 thousand km^(2) in Jinghe, Luohe and Weihe rivers. 24 thousands km^(2) in Zulihe and Kushuihe rivers.
出处
《中国水土保持》
1998年第4期10-12,共3页
Soil and Water Conservation in China
基金
黄委会水土保持科研基金"黄河中游多沙粗沙区区域界定及产沙输沙规律研究"课题资助项目
关键词
黄河流域
重点治理区
全沙
粗泥沙
含沙量
the Yellow River key harnessing areas total-load sediment coarse sediment sediment charge
