黄河中游粗泥沙集中来源区界定研究  

Definition on Source Area of Centralized Coarse Sediment in Middle Yellow River

作　　者：徐建华 吴成基[2] 林银平 高亚军 左仲国[3] 喻权刚[4] 

机构地区：[1]黄委水文局,郑州450004 [2]陕西师范大学,西安710021 [3]黄委黄河水利科学研究院,郑州450003 [4]黄委黄河上中游管理局,西安710021

出　　处：《水土保持学报》2006年第1期6-9,14,共5页Journal of Soil and Water Conservation

基　　金：国家自然科学基金重点项目(50239050);国家自然科学基金主任基金项目(50249024);水利部黄河水利委员会治黄专项(黄规计[2004]197号;黄水保[2005]009号)

摘　　要：通过黄河下游多断面、多钻孔、深层次泥沙淤积物取样级配分析,认为在1960年三门峡水库运行前,下游河道主槽淤积物中0.1 mm以上泥沙占一半。以0.1 mm为粗泥沙集中来源区界定研究中的粗泥沙界限,0.1 mm的粗泥沙输沙模数1 400 t/(km2.a)为粗泥沙集中来源区界定指标,界定出黄河中游粗泥沙集中来源区面积为1.88万km2。该区面积仅占黄河中游多沙粗沙区面积(7.86万km2)的23.9%,但该区产生的全沙量、d≥0.05 mm和0.1mm的粗泥沙量分别占多沙粗沙区相应输沙量的34.5%,47.6%和68.5%,说明该区是名符其实的产粗泥沙“大户”,是当前黄河粗泥沙“源头”治理的重中之重。Through the analysis of grain-size sampling of sediment deposition which from many sections, holes and deep layers in Lower Yellow River, we concluded that sediment deposition grain-size larger than 0.1mm in the main channel occupies 50% before 1960, in which year Sanmenxia reservoir operated. The centralized source area of coarse sediment is 18. 8 thousand km^2, according to 2 indexes, one is grain-size larger than 0. lmm, the other is coarse sediment modulus equal to 1400 t/（km^2·a）. The number is 23.9% of over burdened and coarse sediment, which is 78.6 thousand km^2. But the total sediment, coarse sediment of grain-size larger than 0. 05mm and 0.1 mm is 34.5%, 47.60% and 68.5% of corresponding sediment runoff in over burdened and coarse sediment, respectively. The above-mentioned show that the centralized source area of coarse sediment is the maximum yielding sediment region. So this area is harnessed firstly.

关 键 词：粗泥沙 集中来源区 黄河中游 

分 类 号：P332.5[天文地球—水文科学] P333.4[水利工程—水文学及水资源]