计算河道内生态需水量的DESKTOP RESERVE模型及其应用

DESKTOP RESERVE模型源于构造块方法,计算时只需要历史流量资料,通过河道水情特征来反映河流生态功能。模型分别对平水年基流量、枯水年基流量、平水年高流量与枯水年高流量四个模块进行年值模拟,再分配至月值,模型最终输出为各月不同保证率下的生态需水量序列,用于水资源管理。但由于模型的噪音项包含的不确定性较构造块方法更多,因此模型适用于对河道内生态需水量进行初步快速的预测。

DESKTOP RESERVE model for ecological instream flow requirements of rivers and its applications

The DESKTOP RESERVE model comes from the basic conception of building block methodology(BBM).The ecological function of rivers can be found out by flow regime characteristics based on historical streamflow records.Four blocks were simulated,including annual base flow in normal flow year,annual base flow in low flow year,annual high flow in normal flow year and annual high flow in low flow year,and flows in each month were calculated.The output of the model is the flow series of each month with a range of percentage assurances,which could be used in water resources management.Because the noise term of the model includes more uncertainties than that of BBM,the model can provide fast and preliminary estimations on ecological instream flow requirements.