Lhasa City, The Main Agricultural Areas Of Soil Moisture Monitoring And Warning System Service Platform

Crop areas in Lhasa area are mainly distributed along the valley, representing the total land area of the city area more than 80%, mostly arid and semi-arid land. This stage, most parts of Lhasa, the situation becoming increasingly severe water shortages, in order to solve the water problems, and vigorously promote water-saving irrigation, agricultural water conservation is an effective way. Soil moisture monitoring and forecasting systems, the irrigation water management for the preparation of dynamic water plan, to achieve the strategic objectives of comprehensive water saving irrigation area and provide a strong means. To guide real-time forecasting of irrigation water for irrigation, so that irrigated crops are "timely", "moderate" in irrigation,Agricultural water conservation will help meet the demands of modernization of agriculture for achieving the sustainable use of irrigation water is important. Is a measure of soil hydrological properties of soil moisture on crop supply and utilization standards and can determine an important basis for rational irrigation schemes; soil physical properties on soil fertility and productivity are affected. To know exactly main agricultural areas of Lhasa hydrological and physical properties of soil, an understanding of what the local soil moisture conditions, and provide better services to local agricultural production.In this thesis the main agricultural areas of Lhasa as a carrier to create a guide to the major agricultural areas of soil moisture monitoring and warning services platform is a simple, friendly interface of soil moisture monitoring and warning system. To establish Windows as the operating platform of soil moisture monitoring and warning forecasting system; better use of cross-platform development tools Java2SDK1.4.2 Development Kit for development; store database using Microsoft Access database as data storage distributed databases.System is mainly achieved: the soil data collected by data logging information entered into the data table, waiting for data entry is completed, then through the designed mathematical formula, then after calculation: Dedao each soil layer water content, soil dry weight, Net soil water. The basic data input by the relevant soil data in the table, and can automatically calculate the soil water content data; with data storage capabilities and data transfer out of check function, and in accordance with the calculated data given level of drought, early warning guidance products. Also submitted data with graphical analysis functions,Draw out the week, month, quarter and year data graphics. Data is simple and clear weather on agriculture and animal husbandry of agriculture products and other related guidance; soil moisture artificial collection.The system set up in Lhasa, covering the main agricultural areas of municipal soil moisture information collection system, a history based on historical weather data and crop water requirements calculated from observations of different crop years, the average water demand throughout the growing period; can be based on many years of rainfall data different hydrological year the rainfall in the crop growth period; groundwater information can be based on many years of the crop growth period of groundwater recharge. Then according to crop water balance equation can be in different hydrological years of irrigation water demand. Crop irrigation water demand forecast period. According to the length of time using different methods, real-time irrigation forecasting.The system is based on short-term and long-term weather forecast weather information to calculate the daily crop water requirements, in accordance with the empirical effective daily rainfall and groundwater recharge, and then calculated the daily cycle of wet crop plan an effective water content layer When the plan effective wetting layer water content reduced to a certain degree, you will be required irrigation. System features are: real-time on soil moisture monitoring, monitoring of soil moisture content mainly system. The significance of real-time monitoring of rapid information processing through the real-time supportDynamic, real-time access to information on soil moisture; promoting water utilization. On the dynamic evaluation of irrigation systems and effective supervision, the scientific guidance of irrigation.Paper to guide the management of irrigation water as the main point of departure, the purpose is to improve agricultural water use efficiency, reduce agricultural water use, Dan Shi Wen Ti as the complexity of means and methods of limitations, so many aspects of issues have not been need further depth.