A landslide monitoring technology based on BeiDouand, a wireless sensor network, is proposed in order to solve the problem that landslide has brought severe threat to people’s life and safety of property. The landslide monitoring system based on the BeiDouand wireless sensor network is analyzed and designed from the point of view of hardware and software. BeiDou message and GPRS double redundancy transmission mode are adopted to improve the reliability of transmission. It also adopts the factor compression method to improve the effectiveness of BeiDoutransmission and adopts queue management and packet scheduling mechanism to improve the real-time and reliability of wireless sensor network transmission. The result is that, as the number of visible satellites increases, the efficiency of the algorithm decreases. However, the overall efficiency of the algorithm has been significantly improved. When there are 28 visible satellites, the number of algorithm times decreases from 20,475 to 1,140, and the efficiency of the algorithm increases by 16.9 times. The GDOP simulated by the fast star selection algorithm proposed in this paper is less than 3.9, reaching an excellent grade.
The Baiyinhua area of Inner Mongolia is rich in coal resources but lacks water resources. Water required for ecological restoration in mining area is primarily obtained via pit lake water recycling. However, robust data has not yet been obtained to characterize the nature of the source, evaporation, and supply of the pit lake water. In this study, 20 groups of different water samples in the Baiyinhua mining area were collected, which were subjected to chemical analysis to determine the contents of hydrogen and oxygen stable isotopes (δD, δ18O) and ion ratios. By principal component analysis and the Rayleigh fractionation model, the mechanisms of pit lake water formation and the extent of its evaporation in the Baiyinhua mining area were revealed. The results show that the hydrochemical type of the pit lake water in the Baiyinhua mining area of Inner Mongolia is the HCO3-SO4-Na type, which is different from the surrounding water bodies (HCO3-Na-Ca and Cl-HCO3-Na types). The formation of pit lake water is mainly affected by evaporation (69.42%) and is less affected by groundwater recharge (17.06%) and human activities (11.51%). Due to its open area and relatively closed system, the evaporative loss of the pit lake water is relatively large, at about 40%-61% of the initial water body, which is 1%-22% higher compared to a nearby natural water body.
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