CAJ | 학술논문

调水是目前快速改善湖泊水质的有效方法之一，但是对于调水所能达到的最佳效果研究很少。以杭州西湖为例，利用环境流体动力学模型EFDC构建了西湖TP模型，对通过苏堤各桥孔的流量、外西湖分层流场和水质浓度进行了验证，分析了在现有外围调水情况下增加西湖内循环引水后西湖TP的时空变化。模拟结果表明，增加内循环引水，直接将低浓度区的水引至高浓度区，能够明显降低高浓度区的水质；低浓度区由于引水量的减小，区域内水质浓度会有一定的上升；全湖平均水质浓度基本不会发生改变。在没有增加外部引水的情况下，内循环引水可以使湖泊水体掺混更加均匀，对于防止高浓度区富营养化有很好的效果。增加内循环引水对西湖改善高浓度区水质有一定的指导意义，同时也可为相似湖泊增加内循环引水措施提供借鉴。
조수시목전쾌속개선호박수질적유효방법지일，단시대우조수소능체도적최가효과연구흔소。이항주서호위례，이용배경류체동역학모형EFDC구건료서호TP모형，대통과소제각교공적류량、외서호분층류장화수질농도진행료험증，분석료재현유외위조수정황하증가서호내순배인수후서호TP적시공변화。모의결과표명，증가내순배인수，직접장저농도구적수인지고농도구，능구명현강저고농도구적수질；저농도구유우인수량적감소，구역내수질농도회유일정적상승；전호평균수질농도기본불회발생개변。재몰유증가외부인수적정황하，내순배인수가이사호박수체참혼경가균균，대우방지고농도구부영양화유흔호적효과。증가내순배인수대서호개선고농도구수질유일정적지도의의，동시야가위상사호박증가내순배인수조시제공차감。
Water transfer is an effective approach to improve water quality in the lake. However, there is almost no research focusing on optimum efficiency of water transfer. As a case study of West Lake in Hangzhou City, total phosphorus (TP) model with environmental fluid dynamic code (EFDC) was built. And the water quantity across Sudi, velocities in different layers and water quality were verified. The spatial and temporal distributions of TP concentration with and without internal circulation water transfer were analyzed. The results show that, after increase the internal circulation water transfer, the water in low concentration area was transferred to the high concentration area, which can decrease the TP concentration in high concentration area. Because of the decrease of water quantity in low concentration area, TP concentration was increased in low concentration area. However, the average concentration in the whole lake was remained fairly static. In the condition of same external diversion, the concentration of water quality is more evenly distributed after increase internal circulation water transfer, which has an advantage to avoid the eutrophication in high concentration area. Increase of internal circulation water transfer has a guiding significance for improving the water quality in West Lake, and provides a reference for the similar lakes.