The geographical environment of Yongfu Province

Yongfu is the northwest of Hanoi, the capital, close to the coastal defense of two major ports, the west of Fushou Province, Xuanguang Province and Taiyuan Province, the northeast of the economic development triangle of Hanoi and Quang Ninh Province, and the west of Yunnan-Guizhou Province in China, with a total area of 65,438+0,236,5438+0 square kilometers.

Six different kinds of geology are distributed in Yongfu Province:

Highly metamorphic stone: the remains of the elder sister in the north are distributed in the center of Lishi County, and Tanpingyang forms a belt extending from northwest to southeast.

Hong Shi terrigenous deposit: It is distributed in the southeast of Tantan Island, adjacent to Hanoi, and is the starting point of the pulse.

Stony terrigenous sediments contain coal: truro commune (Tandao), conglomerate, sandstone, shale, coal and coalbed methane lightning; The upper part is composed of sandstone, siltstone and shale, which is grayish yellow and dark gray.

Loose sediments: Quaternary sediments are widely distributed in southern provinces and the Red River basin, including pebbles, gravels, sand, loess, silty clay and red soil. Blue-gray clay and red soil are weathered into light gold gray; Kaolin, Hanoi, Yongfu, Taiping soil green and black clay strata. Surface water literature

There are four major rivers flowing through Yongfu Province, including Red River, Luohe River, Rihe River and Kaloloshen River. Red River system and thick shell endowment system: the annual water consumption of rivers is very large, which can provide 38,200 hectares of agricultural land. It is divided into two main river systems to provide irrigation water.

The Red River system includes two tributaries of the Red River, namely the Shangdahe block on the left bank and the river on the right bank, and the flowing Luhe and Tianhe Xuanguang Yongfu River.

groundwater hydrology

Yongfu aquifer features:

Proterozoic aquifer: high metamorphic rocks, mainly gneiss, quartzite dam and amphibole structure. This rising water has good quality and small flow. But in the demolition area, the water flow can reach 5 liters/second. The ground destroyed its good water quality, which can be used as a drink.

Mesozoic aquifer: formed between volcanic eruption rocks and coal-bearing strata formed by Fanlang in late Triassic. The water quality is uneven, polluted by iron, and the water flow is small in some places.

Cenozoic aquifer: This is an important aquifer. However, due to the thin shell, the water flow is not big, and only 4-5 meters can touch the cornerstone in the deepest part. Among the aquifer faults in the demolition area, concentrated water has great potential and good water quality.

Aquifer fracture: It is formed by fracture, which has great potential and good quality of gathering China.