ABSTRACT
Variations characteristics of ecological water cycle were obtained on the basis of the original data
The area of subsidence land caused by coal mining had been over 20,000 hm2 in Tangshan City, and areas locating in the south of the central were about 3000 hm2, and the largest seasonal and perennial water areas were 700 hm2. It bright some problems of surface uneven, puddles all over, harsh environments because of long mining. All villages relocated because subsidence areas were not suitable for living. There was few people tread because of the discharge of construction and household garbage, sewage, ash in subsidence areas. It wasted a lot of land resources, and seriously damaged the ecological environment of the city, restricted the urban development. The leaderships of the municipal government made the construction of the “four main functional areas” strategic plan in 2007 to build the scientific development demonstration and the happiest area of all the people in Tangshan. South Lake Eco-City was one of the four functional areas. It took the mining subsidence areas into the suburban secondary wetland ecological landscapes.
