A Method for Ecological Restoration of Degraded Wetland in Karst Mountain Area

Abstract

The invention discloses a method for ecological restoration of degraded wetlands in karst mountainous areas, which comprises the following steps: 1) determining the boundary of the degraded wetland to be restored, building a cofferdam at the lowest point of the boundary and setting up a gate on the cofferdam; 2) surveying and mapping the boundary The topography of the degraded wetland to be restored, and the location of the depressions, hills or mounds in the terrain are marked, and drainage channels are excavated from the lowest point of the depression to the gate of the cofferdam; 3) Find the number and location of sinkholes and cracks in the degraded wetland boundary , transfer the soil from the hills or mounds within the degraded wetland boundary to the corresponding nearest sinkholes or fissures; 4) Control the water level of the depressions in the degraded wetlands through gates, and plant peat moss in the depressions in a planned way. The ecological restoration method of degraded wetland in karst mountainous area can effectively restore the ecology of degraded wetland in karst mountainous area at the lowest cost.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to an ecological restoration method for degraded wetlands in karst mountainous areas. Background technique [0002] Wetland restoration, also known as wetland restoration, refers to the restoration or reconstruction of degraded or disappeared wetlands through ecological technology or ecological engineering, to reproduce the structure and function before disturbance, as well as related physical, chemical and biological characteristics, so that it can play its due role. role. my country's subalpine wetlands are typical in development, diverse in types, and powerful in function. They have irreplaceable environmental, ecological, and social functions. They are important ecosystems for maintaining sustainable development in plateau areas and key areas for maintaining biodiversity. One of the sensitive areas of global climate change. However, due to the interference of n...

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Problems solved by technology

[0004] At present, the common restoration method for plateau wetlands is to set up retaining dams in the wetlands, and raise the water level through the retaining dams. Although this maintains the water level of the wetlands, the recovery effect on the wetland vegetation is not obvious. The main reason is that the rapid water level The elevation is not conducive to the restoration of aquatic vegetation, nor can it improve the water retention capacity of the wetland. In addition, the existing retaining dams are all made of reinforced concrete, which is not only expensive but also damages the environment of the wetland.

[0005] In addition, there are few reports on wetland restoration technology especially for karst mountainous areas

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