Research On Groundwater Dynamic Auto-monitoring System Based On Pocket PC

Water is one of mankind precious natural resources. With the development of production and the increase of population, the quantity of water demand is increasing rapidly. Groundwater is an important part of freshwater resources that can directly utilized by mankind, with many advantages such as good quality, abroad distribution, stable water supply amount and long time of the sustainable use and so on. Groundwater plays an important role in people's life and production, in the meantime it is also a restrict factor on our country's sustainable development. In recent years the reduction of rainfall amount seriously influence supply of groundwater, some local blindly and excess exploit groundwater, Due to long-term excess exploitation groundwater, a series of ecological environment problems have been caused.In order to control and the reasonable development ground water resources, real-time monitoring must be carried on to groundwater. Groundwater monitoring is mainly the observation of long-term timing to level and temperature of groundwater, in order to grasp its law and offer scientific basis for rational exploitation, scientific regulating and management of groundwater resources. In the past, groundwater monitoring of our country was mostly by manual observation. So some partial monitoring data lack reliability, and the monitoring data also could not be processed in time. This has restricted the in-depth development of groundwater monitoring. With the constant development of society, it is more important to enhance the accuracy and timeliness of groundwater monitoring data, strengthen the construction of groundwater auto-monitoring system, and realize the transition from manual observation to auto-monitoring.Because data acquisition of groundwater monitoring is completely carried on in the field, it needs computer of excellent performance, good mobility and working for a long time. The system adopted the portable Pocket PC as host computer of data acquiring and monitor is adopted as lower machine, Pocket PC has the characteristic of small size, low power dissipation, convenient operations, and powerful function and so on. This system software development has used Windows Mobile, which was prevalent operating system of Pocket PC now, software development environment Visual Studio.NET 2003, and C# as the developing language based on .NET framework, and it has realized the function of data acquiring, file management, and analysis and displaying. It has adopted serial port RS232 as the communication interface between smart device and lower machine and utilizedmulti-threading to achieve serial port communication. The system adopted the standardized and textual XML mode to store the data.This research is an actual problem based on the groundwater monitoring application. In virtue of fully considered the characteristic of Pocket PC, it has adopted the succinct window interface, simple operation, and it is very fit for field work. The result has proved that the system is not only convenient for the operation, the work is reliable and measuring error answers the purpose, but also cost is cheap and the run is stable.