太原市汾河公园再生水补水方案优化模拟

为了解决汾河公园景观水体因缺乏稳定充足的补水水源而导致的水景效果下降、水质逐渐变差的困境，考虑将再生水作为其主要的补水水源。使用EFDC—WASP水动力水质耦合模型对不同的再生水补水方案下汾河公园水质时空变化进行了模拟。结果显示，当公园采用人工湿地深度处理后的再生水联合水库水共同补水时，除TN指标浓度部分时段内出现超过V类标准限值50％的情况，其他TP、COD、NHf—N主要水质指标浓度均能有效地维持在地表水Ⅱ～Ⅲ类标准，并且叶绿色a浓度始终保持在较低水平。该结果表明，再生水经人工湿地深度处理后联合水库共同补水方案可以作为汾河公园景观水系的推荐补水方案。

Simulation and optimization of recycled water replenishment program on Fen River Park in Taiyuan

Due to lack of stable and adequate replenishment water resource, Fen River Park is facing the dilemma of decline in water landscape and water quality. To resolve this problem, the recycled water is being considered to be the major replenishment water resource. The couple model of EFDC-WASP was employed to simulate and predict the spatial-temporal change of water quality under different schemes of recycled water re- charge. The result indicates that, when the joint replenishment scheme of reservoir and deep processed recycled- water by constructed wetland is taken, the main water quality indexes including TP, COD and NH4＋ -N can reach class Ⅱ-Ⅲ of the surface water quality standard with the exception of TN concentration which in some periods exceeds 50% of the limited value of class V standard. The couple model also predicts a lower level of the chlo- rophyll-a concentration in the whole simulated period. These results indicate that the joint recharge scheme could he considered as the first choice of Fen River Park water replenishment.