Study on modeling of pollutant runoff processes and purification processes

污染物径流过程及净化过程建模研究

• 批准号: 07660313
• 负责人: GOTO Akira
• 金额: $ 1.6万
• 依托单位: Utsunomiya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07660313/
• 关键词: water quality; pollutant runoff; rainfall-runoff model; COD; EC; purification; Tank Model; pollutant runoff formula; 水質汚濁; 汚濁負荷流出; モデルシミュレーション

This research was conducted for the following objectives, based on measurements of discharge and water quality of a small urbanized stream :(1) To clarify the characteristics of pollutant runoff for non-rain periods,(2) To analyze the input-output balance of pollutant in the catchment,(3) To model the pollutant runoff processes for rainfall periods.With respect to the pollutant runoff characteristics, it was found that the change in COD load along with the stream flow direction is corresponding to the pollutant inflow from the area having no sewage treatment and to the channel properties such as vegetation and shapes. As for the pollutant balance, about 15% of COD effluent to the catchment was estimated to be deposited in the channel for non-rain periods.For modeling pollutant runoff processes, a new model combining a rainfall-runoff model and load runoff formulas was developed. Since deposit and runoff processes of pollutant take place on the catchment surface and in the channel, the proposed model was designed to handle the processes in the catchment surface and those in the channel separately. For the base rainfall-runoff model, the Sugawara Tank Model (for runoff on the catchment surface) and the kinematic wave channel flow model were applied jointly. Then different pollutant runoff formulas were applied to the catchment surface runoff and the channel flow respectively. Application of the model to EC load showed good agreements between observed and calculated values of both discharge and load.

本研究基于某城市小流域的流量和水质测量数据，旨在：(1)明确非降雨期污染物径流特征；(2)分析流域污染物的投入产出平衡；(3)建立降雨期污染物径流过程模型。在污染物径流特征方面，发现COD负荷随水流方向的变化与未进行污水处理区域的污染物流入情况以及植被、形状等河道特性相对应。至于污染物平衡，估计约有15%的COD排放到集水区，在非降雨期间沉积在水道中。为了模拟污染物径流过程，建立了降雨径流模型和负荷径流模型相结合的模型。由于污染物的沉积和径流过程分别发生在集水区表面和河道中，因此所提出的模型分别处理集水区表面和河道中的两个过程。基础降雨-径流模型采用了Sugawara罐模型（集水面径流）和运动波槽流模型。然后将不同的污染物径流公式分别应用于集水区地表径流和河道流量。将模型应用于电芯负荷，结果表明，放电和负荷的观测值与计算值吻合较好。