Application of GPRS Soil Moisture Monitoring System in Monitoring Soil Drought and Flood Indexes in Changzhi City
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At present, there are 5 stations at 17 stations in Changzhi City that serve as observation stations for hydrological stations, and 12 stations are commissioned by other local staff to observe and observe. When observing, from the field representing the land type of the local crop, drill two holes with a soil drill over lm above the center of the representative field, and take soil samples not less than 30g in depth at depths of 10, 20, 40, and 60cm, respectively. , Place a special earth box, weigh with a special balance, after drying in the dryer, calculate the percentage of water in the soil. In order to ensure accurate sampling, two holes and the same depth sampling are used for verification.
By using GPRS soil moisture monitoring system to analyze the soil moisture in this area, the main indicators of soil drought and flood can be obtained. Drought prediction and forecasting technology is still at its infancy in Changzhi. In order to meet the needs of Changzhi public opinion monitoring, the sub-bureau has been monitoring and monitoring the soil moisture content in Changzhi City since 2004, based on the local precipitation and the soil moisture content in the previous period, and forecasted by the five-day forecast period. Combined with the monitoring results of the 17 public opinion monitoring stations established in Changzhi City every five days, the forecast data were revised and published on the website of Changzhi Hydrology Bureau. The maximum change of forecast results and measured values ​​was within 10% on the 5th.
The hydraulic cylinder of an excavator is an important component, mainly used to control the movement of the excavator's mechanical arm, stick, bucket head, and other parts. Specific application scenarios include:
1. Construction engineering: Excavator hydraulic cylinders can be used for excavation and transportation of earthwork, excavation of foundation pits, road construction, pipeline laying, and other construction projects.
2. Mining: Excavator hydraulic cylinders can be used for ore mining, blasting, transportation, and loading in mining.
3. Agricultural production: excavator hydraulic cylinder can be used for Land consolidation, irrigation and drainage, ditch excavation, crop harvesting and other work in agricultural production.
4. Hydraulic engineering: Excavator hydraulic cylinders can be used for river dredging, embankment construction, reservoir construction, and other work in hydraulic engineering.
5. Garbage treatment: The excavator hydraulic cylinder can be used for garbage cleaning, compression, transportation, and landfill in garbage treatment.
In summary, excavator hydraulic cylinders are widely used in various engineering and production fields, and are important tools for improving work efficiency and production efficiency.