Combined with the present manual process of hydrographic calculation in Shafan Reservoir in Jinhua, the essay talks about a hydrographic calculation system for reservoirs after the analyze of practical demand, by using Visual Basic6.

In this paper,on the base of research result in the world,taking the example of hydrological computation in the work of some dam safety evaluation,the influence to the downriver reservoir from the upstream is discussed.

Based on the quantitative hydrological computations, this paper analyzes the drainage functions of the shallow dished ditches,space setup of water in lets,drainage functions,silting up of the dark buried ditches and the interact ions between them,and puts forward the general drainage design methods for the shallow dished dark buried ditches for reference.

The paper briefly presents the method of uneven weight distance coefficient for the measurements of system similarity and introduces it to the choices of analogy basins in hydrologic calculation.

This paper introduces the difference between the nonparametic statistics and parameter statistics in hydrology calculation, and expounds the application of the former in hydrology frequency analysis, water resources forecast and simulation.

A discussion on the hydrologic computation method for the highway bridge across the irrigation canal;