京杭运河(杭州段)河网水质模拟

京杭运河杭州段河网属于典型的平原河网地区,根据平原河网的水流以及污染特点,利用一维对流扩散方程建立了该地区河网水质模型,采用全隐中心差分格式离散方程,并用追赶法求解。对京杭运河杭州段河网进行水质模拟,并利用2007年上半年常规水质监测断面水质监测数据对模型计算结果进行验证。验证结果表明水质模拟结果较为理想,模型能较为准确的反映河网水质变化趋势,可以用于该地区河网水质改善研究。

Water Quality Simulation of River Network for Hangzhou Section of Grand Canal

Hangzhou section of Grand Canal belongs to a typical plain river network area. Based on water flow and pollution characteristics of plain network, a river network water quality model was established by one dimensional advection and diffusion equation which is discreted by a full implicit central difference method and calculated by Thomas algorithm. Water quality simulation of Hangzhou section was done and the model was validated by measured data of the first half year in 2007. Results demonstrated the simulation result was quite satisfactory and the model which predicts the water quality variation trend of river network accurately can be used to study river network water quality improvement of the area.