What are the main geological, hydrological and environmental problems in Luodian County?

Luodian County is a county under the jurisdiction of Qiannan Buyi and Miao Autonomous Prefecture, Guizhou Province. It is 63 kilometers wide from east to west and 72 kilometers long from north to south, with a total area of 30 13 square kilometers. It is a multi-ethnic mountainous county dominated by Buyi people, including Han, Buyi, Miao, Yao, Zhuang and Dong. It is a unique "natural greenhouse" in Guizhou.

The general geological characteristics are: rolling mountains, vertical and horizontal valleys, broken ground and obvious mountain features. Karst, hills, basins and Carboniferous rocks are the main landforms in the north and northeast, with an altitude of 600- 1000 meters. There are many caves, caves and underground rivers. The south-central part is mainly composed of sand shale low mountains, valleys and basins, and the elevation is mostly between 300-800 meters. Cultivated land accounts for 6.5% of the total area; Grass hills and slopes account for 28.24%. The forest coverage rate is 12%, and barren hills suitable for forest account for 33. 1% of the total area.

Water resources are because all the rivers in China belong to the Hongshui River system in the Pearl River Basin. There are 22 rivers (except boundary rivers) with a basin area of more than 20 square kilometers, with a total length of 482 kilometers and an average annual runoff of 65.438+77.8 million cubic meters. There are abundant hydropower resources, the theoretical reserve is 482,700 kilowatts, and the exploitable amount is 6,543,8+0,260 kilowatts. The total surface water flow is 3.582 billion cubic meters.

Luodian county belongs to subtropical monsoon climate, with the characteristics of early spring, long summer, late autumn and short winter. Sunshine 1350- 1520 hours, the annual average temperature reaches 20℃, the extreme maximum temperature is 40.6℃, the extreme minimum temperature is MINUS 3.5℃, the annual average rainfall is 1335 mm, and the frost-free period is as long as 30 mm.

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