In natural state,the gross of water resource is equal to sum of the surface water runoff capacity and the natural drainage capacity of groundwater resource,and subtracts the groundwater resource natural drainage capacity from the gross in dry climate(There is a part of the groundwater translation into river basal flow capacity in constantly).

This paper forecasts Runoff and Grain’s production of China based on the theory of cointegration and error correction model.

The influence and understanding of rheological parameters in the development of low permeability oil reservoirs;

Research on rheological parameters of sullage soft-soil and BP neural network model;

Influence of fly ash on the rheological parameters of fresh concrete;