Ecological pearl of North China!Nansihu, the largest freshwater lake in north China, will look like this in the future…

2022-07-18 0 By

Qilu Evening News · Qilu One point reporter Ma Hui “The sun in the west is about to set, weishan Lake is quiet…”Mention of Nansihu, many people may be unfamiliar, but mention of Weishan Lake is a household name.Located at the junction of Shandong and Jiangsu provinces, Nansi Lake is the general name of weishan Lake, Zhaoyang Lake, Dushan Lake and Nanyang Lake. It is the largest freshwater lake in north China and the sixth largest in China. It is responsible for flood control, storage, climate regulation, degradation of pollution, development of aquatic products, shipping and transportation and other functions.The sun was setting in the west.In order to realize the vision of “Ecological pearl of Nansi Lake in North China and ensure water quality safety of the eastern route of the South-to-North Water Diversion project”, shandong province, a number of departments jointly issued the “Special Plan for ecological protection and restoration of Nansi Lake Basin” (hereinafter referred to as the “Plan”).The Plan covers land, forest and grass, mineral resources, geological environment and other natural resources, involving Jining, Heze, Zaozhuang, Tai ‘an and other cities.According to the plan, by 2035, the entire Nansi Lake basin will achieve ecosystem stability, and a fine ecological environment of “green mountains, clear waters, lush forests, fertile fields and beautiful lakes” will be basically formed.Drought water level instability leads to the degradation of wetland resources in the middle of the narrow part is more obvious, the same as the river in the map from far away, Nansihu is like a long and narrow jade belt, “embedded” in the southeast of the mountain, administratively administered by Weishan County jining City.In 1960, the lake was built into a secondary dam to divide weishan Lake into two levels.The Nansi Lake basin is a part of the Sihe River system of the Huaihe River Basin. With the Nansi Lake as the core, the basin covers 34 counties (cities and districts) in shandong, Jiangsu, Henan and Anhui provinces, with a total area of 31,700 square kilometers.The formation of this lake group is historically related to the flooding of the Yellow River.There are 53 rivers in Nansihu lake, and 30 rivers in Nansihu Lake.Twenty-three go into the lower lake.The total area of the east and West lakes of Nansihu lake is 1266 square kilometers, of which the area of water and water conservancy facilities is 1156.68 square kilometers, accounting for 91.4%.Nansihu Basin is an important grain and cotton production base, energy base and freshwater fishery production base in Shandong province and even in China.The waterway in Nansihu lake and Beijing-Hangzhou Grand Canal plays a great role in the regional economic development.The main industrial sectors in the basin are paper making, chemical industry, electric power, food and coal mining.Nansihu lake is rich in biodiversity, and is the wintering, breeding and transfer station of many migratory birds. Among them, there are 10 species of national class ⅰ protected birds, 50 species of National Class ⅱ protected birds, and 294 species of birds including egrets, mallard and merganser.In recent years, remote sensing data have confirmed that Nansihu lake is shrinking, especially in the narrow part in the middle, which is no different from a river.The water level of Nansihu lake is greatly restricted by natural conditions, the wetland vegetation is single, the arrangement of emergent water, floating leaf and submerged water plants is unreasonable, and the integrity of aquatic plant community ecosystem needs to be improved.In drought years, the lake water level is low and the instability of water level leads to the degradation of wetland resources.The gradual reclamation of lakeside by the masses caused serious damage to the ecological environment and wetland resources.The forest structure in the area is unreasonable, and the forest vegetation is mainly pure poplar forest of Europe and America, with too much pure forest, single tree species of artificial forest and too large proportion of middle and young forest.In the summer of 2017, weishan Lake suffered a drought, leaving the root of the cement pillar of the signpost on the waterway bare.Li yansong’s photos are in great contrast to the clear water of the lake. Before 2003, Nansihu lake was in a different state. There were more than 4,000 sewage discharge points on 53 rivers that flowed into the lake, and untreated industrial wastewater was discharged directly into the lake.The turning point came in 2003, when Nansihu became a lake and water diversion channel for the eastern route of the National South-to-North Water Diversion Project.One of the most stringent pollution control curtain.The standard for water quality ranging from the fifth grade of poor quality to the third grade of surface water requires the COD content in water alone to be reduced to 20mg/ cubic meter, which is more than twice the national standard. Nearly 30 coal and coking enterprises in weishan county have been shut down as a result.At that time, Jining put forward the comprehensive control system of “treatment, use, protection and prevention and control” in the basin, which forced industrial transformation with stricter pollution control standards and eradicated water pollution with industrial transformation. The total implementation of pollution prevention and control, water conservancy projects, flood control and drought relief, ecological restoration of 223 projects in 4 categories, invested 15.6 billion yuan.In order to protect the great ecology of Nansihu, Weishan County made a great sacrifice: the removal of 1.15 million photovoltaic panels, complete 40,000 acres of cage net clearance, complete more than 200,000 acres of pond retirement, 12 coal mine exit…They have the most stringent requirements for the implementation of coal mining, artificial farming and illegal photovoltaic power generation projects in the core area of nansihu Nature Reserve.At present, the average annual water quality of Nansi Lake basin has reached the m class standard of surface water, and the excellent water bodies account for 1/3 of the province, making It one of the 14 lakes with good water quality in China. Jining has participated in the pollution control inspection of Huaihe River Basin on behalf of Shandong province for three consecutive times, all of which have won the first place.The ecological system of mountains, rivers, fields, forests, lakes, grass and atmosphere in Nansihu lake has been restored, and the sustainable economic and social development circle around the lake is gradually taking shape.Nansi lake watershed protection and development to meet the significant opportunities to construct “a nuclear one screen at a second with more than three corridors” ecological pattern, however, if you want to build up perfect ecological system function, built the nansi lake basin “eco-friendly, environment beautiful, functional and cultural sustainability” of the harmonious community, to build a “green mountains, clear water, Lin Yu, field water, lake beauty” beautiful picture scroll,There is still a lot of work to be done in nansi Lake basin to ensure that a clear water will continue to move northward.After all, ecosystems and systems need to be sustainable.It can be said that the Provincial Party Committee and government of Shandong province have coordinated the ecological protection and high-quality development of Nansihu Lake, and the provincial departments have concentrated on the compilation of the Plan, which has ushered in a major opportunity for the protection and development of Nansihu Lake basin.The plan will fully align with major national strategies and projects such as ecological protection and high-quality development of the Yellow River Basin, construction of the Grand Canal cultural Belt, and the eastern route of the South-to-North Water Diversion Project, and strive to build an ecological protection and restoration pattern of “one core, one shield, two zones, three zones and multiple corridors”.”One core”, namely nansihu provincial Nature Reserve as the core, gives full play to the key role of the reserve in the construction of ecological civilization.According to the “strict protection, scientific management and rational utilization of” the principle of effective protection, genetic diversity and ecosystem diversity maintaining regional ecological balance function, actively carry out scientific research and rational utilization, promote ecological value accounting evaluation, building sets ecosystem protection and restoration, biodiversity protection, scientific research in an integrated protection system,It provides important support for maintaining ecological security, promoting ecological civilization, and realizing harmonious coexistence between man and nature.Yang Jianwei photography “a screen”, namely to accelerate the construction of jining, Zaozhuang east low hills water conservation, water and soil conservation green barrier.We will protect and restore existing forest vegetation, carry out tending of young and medium-sized forests and restoration of degraded forests, further adjust and optimize the structure of tree species, improve forest landscape, and raise the quality of stand and productivity of forest land.To achieve scientific afforestation of barren hills, we will carry out key projects for afforestation of barren hills, and adhere to measures such as increasing engineering measures, adapting measures to local conditions, adapting trees to suitable sites, mixing of various tree species, and low-density ecological afforestation.”Two belts”, namely, promoting the construction of ecological protection belt along the lake and the Grand Canal.The ecological protection belt along the lake takes the shoreline of the four counties (cities and districts) along the lake as the benchmark and carries out ecological afforestation along the shoreline as the main content.Grand Canal ecological protection belt, with Jining city, Zaozhuang City along the Beijing-Hangzhou Grand Canal 8 counties (cities, districts) as the main axis, the two sides of the Grand Canal ecological greening as the main content.”Three areas”, namely, protect and enhance the farmland concentration area of east Hu, wensi and southwest Shandong.We will coordinate the construction of villages, towns, farmland, road networks, shelterbelts and irrigation canals to improve the ecological environment and raise land productivity by means of comprehensive land improvement across the region.”Multi-corridor”, namely, with the main rivers entering the lake as the axis and the construction of ecological shelterbelts on both sides and the construction of river wetlands as the main contents, a number of ecological corridors are constructed to form the ecological pattern of multiple green belts running through the “three zones” and purify the water quality entering the lake.To carry out aquatic plant community reconstruction project to restore the integrity of the ecological system at the entrance of the lake. Seven key projects are proposed in the Plan, including ecological protection and restoration of protected natural areas, ecological corridor construction, ecological environment restoration of historical mines, land greening, comprehensive management of coal mining subsidence areas, comprehensive land remediation, and scientific and technological innovation support.Firstly, the protection and restoration of wetland ecological environment in the basin will be promoted, including aquatic plant community reconstruction, terrestrial vegetation restoration, shoreline protection, animal habitat protection, and scientific restoration of wetland functions by natural restoration, artificial assisted restoration and engineering restoration.Taking xinxue River constructed wetland as a model, the construction of artificial wetland in the inflow river of Nansihu Lake basin was carried out to construct the aquatic plant community and restore the integrity of the inflow ecological system, so as to improve the river environment and enhance the wetland function.Nansi Lake is home to birds.Among them, wetland protection and restoration will be carried out in aquatic products, farmland and densely populated areas around Nansihu lake, and water eutrophication treatment projects will be carried out.The aquatic plant community reconstruction project was carried out around Nansihu Lake to construct the ecological cycle purification system.In jining weishan lake national wetland park, qufu Confucius zoucheng city lake national wetland park, taiping national wetland park, water margin national wetland park (pilot) surabaya SiHe source national wetland park, jinxiang jinshui lake national wetland park, YuTai LiuQing lake wetland, wetland, zaozhuang YuTai meng floor taierhchuang canal wetland park, shandong its crescent national wetland park, tengzhou lakeside wet stateWetland protection and restoration projects have been carried out in di Park, Shanxian Fulong Lake National Wetland Park, Chengwu Dongyu River Wetland Park, Dongming Yellow River National Wetland Park and Caoxian Yellow River Old Road National Wetland Park.In the ancient canal, Lao Zhao Wang River, Guang Fu River, Sihe, White horse river, Liangji Canal, Zhu Zhao Xin River, new Wanfu River, Dongyu River, Xiaoqing River, Xiaofeng River, Xiaowei River, Xiaojing River, Beisha River, Chenghe, Xinxue river and other rivers into the lake, to carry out the construction of artificial wetlands.In the vicinity of Nansihu lake, on both sides of the main rivers into the lake and on both sides of the key roads in the area, ecological shelterbelt construction is carried out to build an ecological shelterbelt around the lake with excellent local tree species as the main.At the same time, the grand canal, the ancient canal, laozhao locatedon, enough FuHe, SiHe, the white horse river, Liang Ji canal, our Zhao Xinhe, new Wan Fuhe, east river fish, complex xinhe, taierhchuang canal, sand silted, XiaoFeng river, XiaoWei, communist-held XiaoJing river, has the Yellow River, river JuanCheng basket was along rivers into the lake, juye sheen trenches, etc in ecological protection forest belt construction project.In addition, will also promote the greening of towns and villages beautification, fully excavate the idle space of towns and villages, see the gap planting green, carry out “ten thousand villages planting ten thousand trees” activities, green construction to achieve Joe, irrigation, flowers, grass and other reasonable configuration.We will launch a campaign to create “beautiful gardens”, build beautiful villages in succession, and make the sound rural ecology the underpins of rural revitalization.Rippling blue waves, glittering billows, a large lake to conserve a side of water and soil.It is expected that The Nansihu Lake can be built into an ecological lake, an LAN lake and a rich lake, so that the scene of “green mountains, clear water, lush forests, fertile fields and beautiful lakes” will remain forever in the Nansihu Lake basin.