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The soil moisture content is mainly set in the plain hilly areas, and is suitable for sturdy mountainous areas; heavy drought areas and drought-prone areas are preferentially established; soil moisture stations generally have groundwater observation projects, mountainous areas do not consider groundwater observation projects, and plains are combined with groundwater observations as much as possible. The selected sites are adequately represented, including representation of landforms, representativeness of soil, representativeness of meteorological and hydrological properties, and representativeness of planted plants; hilly areas: selection of slopes with smaller slopes and larger areas The plot should be avoided at the bottom of the trench. In the plain area, the representative plot should be set on the ground to avoid the low-lying and easily accumulated water points and keep a certain distance from the canal. The detection point should be as far away from the trees, tall buildings, roads and rivers as possible. , reservoirs and large channels.
There are extensive and in-depth researches and applications, but the sensor method of soil moisture real-time monitoring system has gained rapid application due to its advantages of intuitive, convenient, fast, sustainable observation, and integration with data sending module. At present, there are many sensors used for public opinion, and automatic collection of data and manual data comparison tests are performed on a plurality of sensors. After the sensors have been measured for a period of time, the sensors are gradually integrated with the surrounding soil. The evaluation of the superiority of the sensor is mainly to see if its working condition is normal and stable, whether it has a sensitive response to some external factors, and whether the measured value is accurate and reliable.
Communication network should be based on the actual situation of the scene, the monitoring system can use GPRS / CD-MA, GSM / Zigbee, ADSL and other networks as the communications medium to ensure the smooth rate of automated data transmission, to achieve automatic collection of soil moisture monitoring system. The system should have a modern information management system based on an information acquisition system, using high-speed, safe, reliable computer networks as a means to prevent floods from flooding, and water abstraction as the core. The real-time soil moisture monitoring system aims at realizing flood control, flood prevention, scientific water supply, optimized water distribution, and rational use of water by real-time monitoring of information on water conditions, rain, and conditions.
It is suggested that the real-time soil moisture monitoring system adopts GPRS, Zigbee and ADSL for the data communication of public opinion data collection. Because of the unique operation mode of the GPRS network, the server is required to be online for 24 hours. This places high demands on the equipment of the server, especially It is GPRS that requires the server to have an independent public IP address and is vulnerable to various attacks from the network. Software and hardware firewalls and anti-virus software should be installed on the server side. The county town network adopts the ADSL transmission mode because of the higher fixed IP cost. It can realize long-distance data browsing without 24 hours online. Irrigation area communication adopts Zigbee communication group network mode, close distance and low power consumption. The central station should be equipped with professional and technical personnel to perform routine maintenance on system failures and ensure normal operation of the system before major disasters.
The concept of the above related concepts of real-time monitoring of soil moisture content is also quite profound. In the construction of the real-time monitoring system for soil moisture content, it is necessary to adapt to local conditions and choose the appropriate management model according to the actual situation. With the development of science and technology and people’s increasing awareness of natural disaster prevention, the application prospects of real-time soil moisture monitoring systems have become increasingly widespread, and will bring good economic and social benefits.
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