摘要
1 规划概况灌溉总渠由洪泽湖高良涧闸至六垛南闸总长161.5km.1952年规划概况为:排洪流量700m^3/s;沿线水位:洪泽湖+12.43~+14.70m(废黄河口基面).高良涧闸下+11.36m,运东闸上+10.50m,闸下+10.00m,小沙河(相当阜宁腰闸位置)+7.50m,六垛南闸上+4.40m,河道断面分三段,其平均数据为:运西底宽140.0m,挖深4.7m,青坎宽10.0m;运东上段底宽50.0m,挖深3.45m,青坎宽30.0m,运东下段底宽60.0m,挖深4.05m,青坎宽25.0m.河坡均为1:3.规划采用糙率:河道0.0225,青坎0.025。用上述规划数据计算糙率:河道运西0.0240.运东上段0.0175、运东下段0.0204,青坎均用0.030.详见表1。