黃河中游多沙粗沙區(qū)治理對黃河下游減淤影響研究ppt課件

1、黃河中游多沙粗沙區(qū)治理對黃河下游減淤影響研究The Impact Research of Controlling to Sediment-laden and Coarse Sand Area in the Middle on Sedimentation Reduction of the Lower Yellow River 黃委會水文局Hydrology Bureau ，YRCC 高亞軍 Gao Yajun 2007.6.匯 報 內 容CONTENT1、多沙粗沙區(qū)和粗泥沙集中來源區(qū)簡介 Introduction of sediment-laden and coarse sand area an

2、d coarse sand concentrated source region of the middle Yellow River 3、多沙粗沙區(qū)各治理分區(qū)來沙對下游河道沖淤影響的估算 Outline the area of the sediment overloaded and coarse sediment region to estimates the erosion and sedimentation of rivers lower reaches2、多沙粗沙區(qū)治理分區(qū)的確定 The define of sub-area in sediment-laden and coarse s

3、and area controlling.1 多沙粗沙區(qū)和粗泥沙集中來源區(qū)簡況 Introduction of sediment-laden and coarse sand area and coarse sand concentrated source region of the middle yellow river 多沙粗沙區(qū)和粗泥沙集中來源區(qū)的位置 The location of the sediment - laden and coarse sand area and the coarse sand concentrated source region . 多沙粗沙區(qū)在黃河中游的產沙

4、貢獻 Contribution of sediment production in Sediment-laden and coarse sand area of the middle yellow river 結論：多沙粗沙區(qū)是攔截入黃泥沙的重點區(qū)Conclusion: The sediment-laden and coarse sand area is the most important area to head off the sediment into Yellow River. .粗泥沙集中來源區(qū)在多沙粗沙區(qū)中的產沙貢獻Contribution of sediment product

5、ion in coarse sand concentrated source region of the middle Yellow River結論：粗泥沙集中來源區(qū)是攔截入黃粗泥沙的重中之重地區(qū)Conclusion: coarse sand concentrated source region is the most important area to head off coarse sediment into Yellow River. .2 多沙粗沙區(qū)治理分區(qū)的劃分The define of sub-area in sediment-laden and coarse sand area

6、controlling 2.1 劃分原則Dividing Principles 1.快速減少下游河槽粗泥沙淤積； The rapid degradation of the coarse sand of Channels sedimentation deposition in lower .2.治理面積相對較小，攔減粗泥沙量相對較多； A relatively small area and the relatively large amount of coarse sediment reduction interceptions .3. 對入黃水資源影響較小；Little Impact of t

7、he Yellow River Entered water Resources .4.當地生態(tài)環(huán)境改善與下游河道減淤同步。Principle to improve the ecological environment and in the lower reaches Minimizing deposition of synchronicity .2.2 分區(qū)指標Dividing index 經過論證，以粒徑0.1mm為粗泥沙界限，以粒徑0.1mm的粗泥沙輸沙模數1400 t/(km2a)和700 t/(km2a)為指標，對多沙粗沙區(qū)進行進一步劃分。 After verification, we

8、 take the diameter larger than 0.1mm in diameter as limits of coarse sediment, and take 1,400 tons sediment modulus (km2a) and 700 tons(km2a) which have larger than 0.1mm diameter sediment as an indicator to further divide the sediment-laden and coarse sand areas.2.3 劃分結果Dividing Result1區(qū)：F=1.88萬km2

9、2區(qū)：F=2.06萬km23區(qū)：F=3.92萬km2.Way1：Index selection According to the above results and the research results of zhangren, for estimating the effect of deposition and erosion in the lower reaches of the river, If the first, second and third districts were intercepted 100 million t of sediment, the reducti

10、on of the lower reaches of the river estimated at 0.7 million tons,0.5 million tons and 0.3 million tons by lower volume.3多沙粗沙區(qū)各治理分區(qū)來沙對下游河道沖淤影響的估算 Outline the area of the sediment overloaded and coarse sediment region to estimates the erosion and sedimentation of lower reaches of a river .3 多沙粗沙區(qū)各治理

11、分區(qū)來沙對下游河道沖淤影響的估算Outline the area of the sediment overloaded and coarse sediment region to estimates the erosion and sedimentation of lower reaches of a river ProjectUnitSediment reductiontargetsZone1Zone2Zone3the sediment overloadedand coarse sediment regionAreakm21.882.063.927.86Surface water quant

12、ity*108m310.197.9913.0031.18Sediment transportingquantity*108 t2.771.903.348.01Sedimentreductionquantity*108 t10%0.280.190.330.8020%0.550.380.671.6030%0.830.571.002.4050%1.390.951.674.0170%1.941.332.345.6190%2.491.713.017.21Sedimentationreduction quantity*108 t10%0.190.100.100.3920%0.390.190.200.783

13、0%0.580.290.301.1750%0.970.480.501.9570%1.360.670.702.7290%1.750.860.903.50.3.2 多沙粗沙區(qū)不同程度治理后對黃河下游減淤量的估算Outline the area of the sediment overloaded and coarse sediment region to estimates the erosion and sedimentation of lower reaches of a river. 時段period項目Project來沙(億t）Come silt下游河道淤積(億t）deposition i

14、n the lower reaches單位來沙淤積比Come silt deposition ratio來沙貢獻(億t）Come silt contribution1950-2000六站Six station13.513.38 7.868.01 25%2.001.882.880 33%0.95 way 2 According to the six station and lower reaches silt deposition ratio to calculate silt deposition per unit. We had the ratios are 25% and 33%, the

15、 depositions are 2 and 0.95 hundred million tons. 3 多沙粗沙區(qū)各治理分區(qū)來沙對下游河道沖淤影響的估算Outline the area of the sediment overloaded and coarse sediment region to estimates the erosion and sedimentation of lower reaches of a river . 主要結論 Conclusions多沙粗沙區(qū)得到不同程度治理后，在減少入黃沙量的同時，也減少了下游河道淤積量，隨著各治理分區(qū)實施水土保持綜合治理程度的提高，攔減的入黃泥沙越多，相應的減少河道淤積量也越多。 After the Sediment-laden and Coarse Sand Area is under the varying degree government, while reduces into the yellow sand quantity, also reduced the lower reaches silt deposition quantity, along with each government