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以天津市梅江景观湖为例,在充分考虑当地丰枯条件的基础上,引入生态环境需水理论,对该人工湖进行了水量、水质联合优化配置。研究表明,无论湖泊蓄水等级处于不变、降低、提高等情况,人工引水量均远大于自然引水量,分别占三种情况下引水总量的84.40%、75.86%和70.69%,且湖泊水质均可达标。此外,在保证城市人工湖生态系统健康的基础上,充分利用蓄水等级降低时多余的储蓄水量及丰水年的降水,可降低一定的供水费用。同时,为了保持湖泊生态系统的稳定性,应防止蓄水等级的突变。
Taking Meijiang Lake in Tianjin as an example, on the basis of taking full account of the local conditions of abundance and dryness, ecological water demand theory was introduced to optimize the allocation of water quantity and quality to the artificial lake. The results show that, irrespective of the water storage level of the lake, the artificial water diversion is much larger than the natural water diversion, accounting for 84.40%, 75.86% and 70.69% of the total water diversion in all three cases, and the lake water quality Can reach the standard. In addition, on the basis of ensuring the health of the urban artificial lake ecosystem, it is possible to reduce the water supply costs by making full use of excess savings when the water level is reduced and precipitation during the wet season. In the meantime, in order to maintain the stability of the lake ecosystem, sudden changes in the water level should be prevented.