| The research is about the scope of the northern flatland welling irrigated area(e.g. Handan),introducing the condition of natural geography in Handan the object of studyy, which includes: location and topography, climate, watershed, groundwater exploitation and utilization and the condition of social economy. Making an overall analysis to rainfall of Handan, it also makes an explain with the date choose, collection and analytical ways of rainfall. It makes sure of statistical data by analyzing different typical analysis and an accurate calculating analysis.Setting up an appropriate water resource model according to the district characteristics of Handan, giving accurate analysis of water resource of different years, on the basis of that, it analyzed and determined the unite dispatch strategy of the soil water reservoir, underground water reservoir and natural rain falls, making joint calculation to realize making sufficient and reasonable use of rainfall in flood season. In addition, it establishes math model about the best benefit in condition of different crop with different condition. Making computer analogue test with the example of Guantao county in Handan, the result shows that it reaches the goal of exploiting and using water resource reasonability by adjusting the agriculture pattern of plant and other related measure, through which the rainfall resource can be self-balance satisfy every agricultural need in one district in one year or many years.The entire model inspected through working result already basically reaches anticipated results, being able to be satisfied revising the irrigation pattern according to different water year, being very strong operational and significant practical value. Now the water resource north china is short-supplied should, the study offers a new thought for water resource fully utilizes, basis ensure supply for the agriculture development, also new space for the Agricultural Engineering studies. |
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