The Study Of Winter Wheatscience Irrigation In Linzhang City Hebei Province

Water is the lifeline for human surviving and development, which is also the lifeblood of the national economy and ecological environment. With the social economic development and rapid growth of population, water demand is dramaticly increasing. Contradiction between water supply and demand has become increasingly prominent. On the one hand, it seriously hampers the economic and social development, on the other hand it deteriorates the water environment. Therefore, effective measures are needed to fulfill efficient water utilization and alleviate the contradiction between water supply and demand.Linzhang is located in southern Hebei Province, which is the main winter wheat producing areas 96.4% of total water consumption in Linzhang was come from groundwater exploitation, in which the exploitation of groundwater by agricultural water use accounts for 82.3% of the total exploitation groundwater. The average annual decline in groundwater level was about 0.9m. So by reducing irrigation water and without the agricultural income declination, water-saving agriculture was urgently required to ease the situation of local water scarcity.This paper relied on the efficient water utilization from "integrated water resources management in Linzhang Hebei Province", according to the content of "Science irrigation system in Linzhang Hebei Province ", the following aspects were studied. First, the basic principles and core content of the study were analyzed and the methods used in the text were briefly describes. Second, water resources evaluation about Linzhang was conducted and water status was investigated and analyzed to show the conflicts between water supply and demand. Third, according to relevant theory, moisture production function of winter wheat were determined, on this base equation on the cost-effectiveness and water inputs of winter wheat had been established. The economy water demand of winter wheat in different hydrological year can also be determined according to the marginal theory of economics. Fourth, a valid rainfall and soil moisture consumption of winter wheat during its growing season can be decided and volume of water shortage can be knocked out. Fifth, Linzhang SWAT model was established and different scenarios simulation were carried out concern above water shortage. In addition, winter wheat production in different situations were simulated and a comparison between the calculated and actual production was proceeded, finally a rational scientific irrigation system was worked out.