Simulation of water temperature in two reservoirs with Delft3d

International Conference on Water Resource and Environment 2016

地球科学;生态环境科学

Yang, J.Y.^1 ; Zhou, L.Y.^2

Anhui Bengbu No.2 High School, Bengbu

233000, China^1

China Water Huaihe Planning, Design and Research Co., Ltd, Hefei

230000, China^2

关键词: Chongqing cities;    Layer model;    Lower temperatures;    Measurements of;    Temperature of water released;    Temperature profiles;    Three-layer;    Water temperatures;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/39/1/012073/pdf
DOI  :  10.1088/1755-1315/39/1/012073

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The proposeled Guanjingkou and Fengdou reservoir will be constructed at Chongqing city and Muling city in China respectively. The water temperature in the reservoir, in the downstream, and the aquatic ecosystem would be altered by the construction of the reservoirs. This paper simulates the water temperature in the two reservoirs by using the Delft3d z-layer model, which uses the fixed elevation for layers. According to the simulation results, the temperature profile in the reservoirs can be divided into three layers: the upmost epilimnion layer, the beneathed thermocline layer, and the constant tepmerature layer at bottom. The temperature effects can be reduced by measurements of stoplogs gates and mutiple gates, respectively. Based on the simulation results in the wet, nomal, and dry year, the temperature of water released from the stoplogs gates at Guanjingkou reservior can be respectively increased by 5.7°C, 6.8°C, 9.6°C, and 5.5°C in the irrigation season from May to August. The temperature of water released from the mutiple gates at Fengdou reservior can be respectively increased by 7.7 °C, 1.9 °C, 9.5 °C, and 10.1 °C from May to August. The negative impacts from the water with lower temperature on the related ecosystem can be significently alleviated.