Eutrophic investigation and assessment on backwater reaches of several typical branches of three gorges reservoir at 135m water level 水位蓄水典型次級河流回水段富營養(yǎng)化監(jiān)測評價
Based on the topographic features and data of sediment particle size of bed load at the fluctuating backwater reach of liujiaxia reservoir , the streamwise variation and variation process of median diameter of bed load during silting and scouring periods of the fluctuating backwater reach are analyzed , and it can be seen that the turning point for the sediment diameter variation from coarse to fine is located at the outlet of shigou gorge of the fluctuating backwater reach 摘要根據(jù)劉家峽水庫變動回水區(qū)的河段地形特征和歷年河床質(zhì)泥沙粒徑級配資料,分析了變動回水區(qū)河段淤積和沖刷時,河床質(zhì)泥沙中值粒徑的沿程變化和歷年河床質(zhì)泥沙中值粒徑變化過程,并指出粒徑分布由粗變細的轉(zhuǎn)折點在變動回水區(qū)寺溝峽峽口處。