52.8208.23.0151.83.3107.03.581.23087.52.8395.52.9319.43.1269.53.2224.03.3190.83.6139.14.098.04.274.44072.53.7327.73.9264.64.1223.34.3185.64.4158.14.8115.35.381.25.661.65056.04.7253.14.9204.45.1172.55.4143.45.6122.16.089.06.662.77.147.66040.55.6183.15.9147.86.1124.76.4103.76.788.37.264.47.945.48.534.47026.06.5117.56.994.97.180.17.566.67.856.78.441.39.229.19.922.18015.07.467.87.854.88.246.28.638.48.932.79.623.910.616.811.312.8906.58.429.48.823.79.220.09.616.610.014.210.810.311.97.312.75.51000.09.30.09.80.010.20.010.70.011.10.012.00.013.20.014.10.04.泥沙根据隆务河的成果,采用多年平均侵蚀模数为159t/km2.a,计算水库坝址处的多年平均输沙量为3.65万t,推移质泥沙按悬移质的20%计,则多年平均输沙量为4.38万t。5.河道水位流量关系曲线与水库特征曲线图3夕昌水库坝址天然水位流量关系曲线(上坝址)流量Q(m3/s)水位Z(m)根据1:1000库区地形图绘制的夕昌水库上坝址横断面如图2,计算可知该河段纵比降i=43‰。根据该河段的基本情况,河床糙率取n=0.067,由曼宁公式计算某一水位时河道的天然流量,天然水位和流量关系如图3。
全文预览
