为了保障黄河功能性不断流和供水水质安全，利用VB和Access软件开发了黄河自净需水量计算模型系统。该系统采用三层C/S结构模式，其核心层为系统应用层，由数据采集与更新、方案制定、模型计算、结果查询和系统管理等5个子系统组成，能够在黄河特定河段、特定排污口及支流空间分布条件下，根据不同的上游来水背景浓度及河流纳污状况，优化计算出河流接纳合理污染物所对应的、河流必须蓄存的、满足相应水质目标要求的最小水量及水量过程。系统界面友好，操作方便，具有很强的实用性和参考价值。

In order to ensure the functional continuous flow and water quality safety of water supply in the Yellow River, a calculation model system of self-purification water requirements in the Yellow River was developed based on VB and Access. The system applied the three-tier client/server mode, and its core layer is the application layer which is composed of five sub-systems including the data acquisition and updating, plan formulation, model calculation, results query, and system management. The system can be used to calculate the self-purification water requirements under the spatial distribution conditions of specific outlets and tributaries of the Yellow River. According to different background concentrations and river pollution conditions of the upstream water, this system can perform the optimization calculation to determine the minimum water and water process which can allow the pollutants to be stored in the river and satisfy the requirements of water quality objectives. The system is convenient with friendly interfaces, and has significant practicability and reference value.

水利部公益性行业科研专项经费项目（200901023）；国家“十一五”科技支撑计划（2006BAB06B08）