Research On The Configuration Of Aquatic Plants In Southern River And Reservoir Wetland Parks

At present,the construction of wetland parks in China is developing rapidly,especially in the south,where there are abundant water resources and many wetlands.Judging from the number of national wetland parks,there are 145 national wetland parks(including 129 permanent river wetland types)and 138 artificial wetlands(Including 127 wetland types in reservoir),our country is mainly composed of river-type wetland park and reservoir wetland,which account for 33.8%and 32.2%respectively.Aquatic plants are a vital part of wetland parks.They have the effect of reducing water pollution and maintaining ecological balance,while enhancing the landscape value of wetland parks.However,in many wetland parks,the plant configuration is still quite confusing,mainly because there is no plant configuration for different types of wetland parks and plant characteristics.In this paper,the research on the reasonable configuration of aquatic plants for the two types of river-type wetland park and reservoir wetland in the south.It is of great significance to the sustainable development of wetland parks.Based on the existing research at home and abroad,this article first summarizes the current problems of the wetland park plant configuration and puts forward the suggestions for the allocation of aquatic plants in the wetland park:mainly based on the two factors of wetland type and aquatic plant characteristics.(1)Wetland type:River-type wetland parks have large changes in water level and rapid water flow.The plant configuration is mainly concentrated on both sides of the river channel and tidal flats.The embankment of plants and wet woody plants are generally arranged according to the river embankment with constant water level;The water flow of reservoir wetland park is slow,the system is relatively closed,and the water level is relatively stable,but the water level in the middle of the reservoir is generally deep and the periphery is low.The plant configuration mainly reflects the purification function,diversity and landscape principles of plants.(2)Characteristics of aquatic plants:configuration according to the requirements of the plant for water depth,the growth and tillering characteristics of the plant,and the adaptability of the plant to seasonal changes.Then,according to the main types of wetland parks in the south,a collection of practical cases was conducted to study the configuration of aquatic plants in two different types of wetland parks:river type and reservoir type.(1)For the river-type wetland park,taking Hunan Xinning Fuyijiang National Wetland Park as an example,considering its own geographical location and the characteristics of a large number of native plant belts,combined with the principles of integrity and landscape,the plant configuration is mainly due to On the basis of retaining native plants,the revetment can use:reeds,scallions,Zaili flowers,reeds,cattails,etc.,and the shoals can use:metasequoia,pond cedar,willow,etc.,the middle of the river type wetland has a rapid flow and the water level changes Large,not very suitable for artificial configuration of plants.(2)For the reservoir Wetland Park,taking Yandu National Wetland Park in Huaiji,Guangdong as an example,due to its greater human influence and the weak purification capacity of the water body of the pond,after comprehensive analysis and consideration,the area of the wetland park was purified.The type of plant configuration is mainly submerged plants with strong purification capacity:such as Vallisneria natans,etc.,to speed up the restoration and purification of water quality in the area,and at the same time embellish a small amount of water lilies to improve the overall landscape Value;the regional two diversity plant configuration mainly includes lotus,canna,Arundo variegata,etc.,fully applying the principle of biodiversity;the regional three landscape plant configuration includes canna,yellow calamus,celandine,water lily,The plant configuration in this area follows the laws of nature,fully understands the terrain conditions,landform features,natural landscape and other studies of the wetland zone and uses the local natural vegetation types,landscape patterns and characteristics for scientific construction,which appears more holistic.In summary,for different types of wetland parks,combined with their own advantages and disadvantages,according to local conditions,make different plant configuration models,and strive to achieve the harmonious unification of landscape,economy,and ecology.