太湖水齡分布特征及“引江濟(jì)太”工程對(duì)其的影響
[Abstract]:Taihu Lake is a typical wind-induced current lake. Wind field plays an important role in the process of water transportation and exchange. Based on the environmental hydrodynamic model (EFDC), the chromatin model and water age model were established. The long-term transport process and regeneration rate characteristics of Taihu Lake were studied with the aid of water age, thus providing a scientific basis for the water transfer project management of Taihu Lake. On the basis of studying the seasonal distribution characteristics of water age in Taihu Lake under the action of different wind fields in spring, summer, autumn and winter, combined with the measured wind speed and discharge data of Taihu Lake and the current situation of water diversion operation of "diversion from Yangtze River to Taitai" project, this paper studies the characteristics of seasonal distribution of water age in Taihu Lake. The influence of water transfer operation and Xingou River project on the water age distribution of Taihu Lake is analyzed. The results of numerical experiments show that the water exchange in Taihu Lake is obviously influenced by the monsoon, the water age is relatively large in spring and summer, the water exchange is poor, the water age near the entrance of the lake current is smaller, and the water age is longer in the place far from the entrance. When the flow direction is consistent with the wind direction, the water age decreases and the water cycle accelerates, otherwise, the water cycle slows down. The water diversion project of Wangyu River can reduce the water age of Gonghu Lake and its central area, and speed up the water cycle in the Lake area and its core area, while the diversion project of Xingou River Project can reduce the water age of Meiliang Lake area and improve the water quality of the lake area. The implementation of water diversion project has made an important contribution to speeding up the water cycle of Taihu Lake.
【作者單位】: 河海大學(xué)海岸災(zāi)害及防護(hù)教育部重點(diǎn)實(shí)驗(yàn)室;江蘇省水文水資源勘測(cè)局;
【基金】:江蘇省水利科技項(xiàng)目(2015054) 江西省水利科技項(xiàng)目(KT201405)聯(lián)合資助
【分類號(hào)】:TV67
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