Asscessment And Suggestions For Sustainable Utilization Of Groundwater Resources In The Farm Of Friendship

Because of a great deal of unreasonable factors about the groundwater development,it aggravates many problems such as the regional decline of groundwater table in this area,descended funnel developing to vertical and depth,and the water environment problem obvious day by day.After referring to a large amount of relevant at home and abroad literatures,based on the systematic analysis of natural geography,topography,geology,climate,analysis of water resources in the study area.(1)On the basis of collecting and analyzing physical geography and geological background materials,we analyze the hydro geological environments and current exploitation situation of groundwater of research area,in order to establish the foundation of setting up the hydro geological conceptual model.Analysis on current situation of exploitation and utilization of groundwater resources,the construction of underground water in mechanical and electrical wells in friendship farm,explain causes and consequences of groundwater overdraft.(2)Groundwater dynamic law is an important basis for agricultural water management in agricultural regions.Mann-Kendall analysis wethod was used to find the trend mutation of groundwater depth series of Frtion and the rice irrigation friendship farm,and comparative analysis of the annual growth data of rice cultivation area was performed to find out the response-reletionship between the groundwater dynamic trends mutation and the rice irrigation area.Simultaneously,the method of standardized precipitation index was used to study the impact of precipition on groundwater dynamic trends mutation.The results show that when proportion of agricultural water consumption decreases,the output value of primary industry decreases as well;the groundwater drawdown trends have time-segment character with declining quickly in initial and last stage while relatively more slowly in intermediate stsge and the downward trend mutation of groundwater levels of most frams occurred from 2001 to 2002 and from 2006 to 2007.The groundwater drawdown trends were controlled both by the annual frowth dated of rice cultivation area and precipition in the first and second stages,while mainly controlled by the former.(3)Exploitation and utilization of groundwater resources,2010 as the base year,by forecasting the supply and demand of 2020 and 2030 year plan.From two aspects of supplyand demand,On the basis of holding water demand and water supply quantity,To study whether the water resources have the ability to protect.In well irrigation area is a typical agricultural area,research methods such as the principle of water balance,the scale and the probability of statistical,Analysis and calculation of the current situation of food crop water requirement and the amount of groundwater,And establishes the index system of the degree of protection of groundwater security in grain production.In the area of food production security of groundwater were analyzed for the evaluation results put forward to alleviate the water shortage put forward effective measures to control the rice area,through water-saving irrigation technology to reduce the irrigation quota and expounds the theoretical basis of developing ground water etc..According to the study area of agricultural irrigation water-saving irrigation has a larger space and develop reference surface water engineering,can guarantee the premise of water demand in the study area significantly improve the regional groundwater environment,alleviate groundwater trends and consequences.(4)Evaluation of current groundwater resources of friendship farm,the main to determine the amount of groundwater resources and exploitation.According to different calculation,based on the available data,Calculation of water resources by using water balance method and mining coefficient method,The mathematical simulation model of the partial differential equation for the groundwater flow in the study area is derived by using the effective mathematical method.And the solution of the mathematical simulation model is derived in the case of the original ideal condition.Calculation result: the total amount of groundwater resources was 64021.72×104m3/a,and the amount of groundwater was13276.02×104m3/a.The result is that the analysis of groundwater resources has a guiding role,which can provide data support for the development and utilization of groundwater in the study area from the theoretical point of view.(5)Supply and demand balance analysis of farm water resources,analyze the reason of water shortage and put forward countermeasures and suggestions for the sustainable development of rice production.