發(fā)布時(shí)間：2018-04-13 04:05

  本文選題：sediment + restoration　； 參考：《Journal of Geographical Sciences》2017年04期

【摘要】：River basin reservoir construction affects water and sediment transport processes in downstream reaches. The downstream impact of the Three Gorges Projects(TGP) has started to become apparent:(1) reduction in flood duration and discharge, and significant reduction in sediment load. Although there was some restoration in downstream sediment load, the total amount did not exceed the pre-impoundment annual average;(2) in 2003 2014, the d 0.125 mm(coarse sand) load was restored to some degree, and to a maximum at Jianli Station, which was mainly at the pre-impoundment average. After restoration, erosion and deposition characteristics of the sediment was identical to that before impoundment. The degree of restoration during 2008 2014 was less than during 2003 2007;(3) after TGP impoundment, there was some restoration in d 0.125 mm(fine sand) sediment load, however, it was lower than the pre-impoundment average;(4) due to riverbed compensation, the d 0.125 mm sediment load recovered to a certain degree after impoundment, however, the total did not exceed 4400×10~4 t/y. This was mainly limited by flood duration and the average flow rate, and was less affected by upstream main stream, tributaries, or lakes. Restoration of d 0.125 mm suspended sediment was largely controlled by upstream main stream, tributaries, and lakes, as well as by riverbed compensation. Due to bed armoring, riverbed fine suspended sediment compensation capability was weakened;(5) during 2003 2007 and 2008 2014, Yichang to Zhicheng and upper Jingjiang experienced coarse and fine erosion,lower Jingjiang experienced coarse deposition and fine erosion, Hankou to Datong had coarse deposition and fine erosion, and Chenglingji and Hankou was characterized by coarse deposition and fine sand erosion in 2003 2007, and coarse and fine erosion in 2008 2014. This difference was controlled by flood duration and number at Luoshan Station.
[Abstract]:River basin reservoir construction affects water and sediment transport processes in downstream reaches.The downstream impact of the Three Gorges projects) has started to become parent: 1) reduction in flood duration and charge, and significant reduction in sediment load.Although there was some restoration in downstream sediment, the total amount did not exceed the pre-impoundment annual average2) in 2003, the d 0.125 mm(coarse and load was restored to some degree to a and at Jianli staff, which was mainly at the pre-impoundment average.After restoration, erosion and deposition characteristics of the sediment was identical to that before impoundment.This was mainly limited by flood duration and the average flow rate, and was less affected by upstream main stream, tributaries, or lakes.Restoration of d 0.125 mm suspended sediment was largely controlled by upstream main stream, tributaries, and lakes, as well as by riverbed compensation.This difference was controlled by flood duration and number at Luoshan Station.
【作者單位】： State
【基金】：National Natural Science Foundation of China,No.51479146,No.51579123,No.51509012 Fundamental Research Funds for Central Welfare Research Institutes,No.TKS160103;No.TKS150102 The National Key Research&Development Programs,No.2013BAB12B01 National Key Research Program of China,No.2016YFC0402106
【分類號(hào)】：TV147

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 ;Soil Loss by Wind Erosion for Three Different Textured Soils Treated with Polyacrylamide and Crude Oil, Iraq[J];Journal of China University of Geosciences;2001年02期

2 ;Spatial distribution of wind erosion and its driving factors in China[J];Journal of Geographical Sciences;2001年02期

3 Bun Hean,Vin Bun Pov;Erosion and Sediment Disasters in Cambodia[J];Earthquake Research in China;2002年03期

4 ;Soil erosion in China based on the 2000 national remote sensing survey[J];Journal of Geographical Sciences;2002年04期

5 ;~(210)Pb_(ex) depth distribution in soil and calibration models for assessment of soil erosion rates from ~(210)Pb_(ex) measurements[J];Chinese Science Bulletin;2003年08期

6 宋煒,劉普靈,楊明義,薛亞洲;Using REE Tracers to Measure Sheet Erosion Changing to Rill Erosion[J];Journal of Rare Earths;2003年05期

7 ;Assessment and spatial distribution of sensitivity of soil erosion in Tibet[J];Journal of Geographical Sciences;2004年01期

8 ;Soil Erosion on a Slope without Vegetation: a Simulating Experiment on a Bare Land in Mt.Tanakami[J];Wuhan University Journal of Natural Sciences;2004年04期

9 ;A review of soil erodibility in water and wind erosion research[J];Journal of Geographical Sciences;2005年02期

10 ;Riverine carbon fluxes and soil erosion in the Zhujiang(Pearl)River Drainage Basin, South China[J];Chinese Journal of Geochemistry;2006年S1期

相關(guān)會(huì)議論文 前10條

1 ;Using the RBFN model and GIS technique to assess wind erosion hazard of Inner Mongolia,China[A];中國(guó)地理學(xué)會(huì)2006年學(xué)術(shù)年會(huì)論文摘要集[C];2006年

2 ;Modeling of erosion and deposition on rough test limiter exposed to the edge plasma of TEXTOR[A];第十五屆全國(guó)等離子體科學(xué)技術(shù)會(huì)議會(huì)議摘要集[C];2011年

3 ;Modeling Sediment Yields in A Small Gully of the Sichuan Hilly Basin Using Geowepp Model[A];Information Technology and Computer Science—Proceedings of 2012 National Conference on Information Technology and Computer Science[C];2012年

4 ;A study on responses of soil erosion and sediment yield to closing cultivation on sloping land in a small catchment using ~(137)Cs technique in the Rolling Loess Plateau,China[A];中國(guó)科學(xué)院地質(zhì)與地球物理研究所二○○三學(xué)術(shù)論文匯編·第三卷(地球環(huán)境·工程地質(zhì)與災(zāi)害)[C];2003年

5 ;Holocene Colluviation and its Implications for Tracing Human-induced Soil Erosion and Redeposition on the Piedmont Loess Lands of the Qinling Mountains,Northern China[A];中國(guó)地理學(xué)會(huì)2006年學(xué)術(shù)年會(huì)論文摘要集[C];2006年

6 ;Ecological Laws of Soil and Water Lose in Red Soil Hilly Areas[A];中國(guó)生態(tài)學(xué)會(huì)2006學(xué)術(shù)年會(huì)論文薈萃[C];2006年

7 ;Responses of Rain Splash Erosion and Soil Crust Development to Particle Size[A];Proceedings of Symposium from Cross-strait Environment & Resources and 2nd Representative Conference of Chinese Environmental Resources & Ecological Conservation Society[C];2010年

8 ;Environmental Problems and the Use of Vetiver Grass for Revegetation in Rare Earth Mine , South China[A];2006中國(guó)草業(yè)發(fā)展論壇論文集[C];2006年

9 ;Erosion Development of Gully System in Loess Residual Upland Gully Region[A];Proceedings of Symposium from Cross-strait Environment & Resources and 2nd Representative Conference of Chinese Environmental Resources & Ecological Conservation Society[C];2010年

10 R.Wilhelm;;EROSION of PCD TOOLS[A];2005'全國(guó)木工刀具生產(chǎn)及應(yīng)用技術(shù)研討會(huì)資料匯編[C];2005年

相關(guān)碩士學(xué)位論文 前1條

1 波西（Torabazpoyesh）;中尺度流域土地利用變化對(duì)土壤侵蝕產(chǎn)沙的影響[D];華中農(nóng)業(yè)大學(xué);2014年

，

本文編號(hào)：1742835