Management and development of Lingjiang River

Reservoir construction is 20 13, the feasibility study report of Zhuxi reservoir project is completed, and the physical investigation of immigrants is completed 95%; The preliminary design of Fangxi Reservoir Project passed the examination and approval; The preliminary design review of Baixi Reservoir Project was completed; Yuxi reservoir project implements resettlement. List of Main Reservoirs in Lingjiang River Basin Names and types of reservoirs related to river rainwater collection area (square kilometers) Total storage capacity (ten thousand cubic meters) Main functions Changtan Reservoir The large Yongning River 44 1.373200 is mainly used for irrigation, flood control, power generation and water supply, while Niutoushan Reservoir is mainly used for flood control and irrigation. Power generation and water supply: Shifengxi 296 19900 flood control irrigation in Shimen Reservoir, Yong 'anxi 259 13500 flood control irrigation combined with power generation, and Yong 'anxi 92.5438+0245 irrigation combined with Lilin Reservoir. Combined with power generation and flood detention, the medium-sized Shifengxi 60.9 1372 Longxi Reservoir pumped storage power generation peak shaving 762558 is mainly power generation, while the medium-sized Longxi 35.62840 in Xikou Reservoir is mainly water supply, combined with flood control irrigation of the medium-sized Xijiang River in Fuling Reservoir 18.2 1727.7. The medium-sized Lingxiu River 13.9 19 17 of Lingxiu Reservoir for irrigation, power generation and fish farming is mainly used for flood control. Beiyang Soil is located about 7 kilometers east of Shangpan Town, Linhai City, and the enclosed area is adjacent to the East China Sea in the north-south direction. The enclosed area is 32,700 mu, with a width of about 3 kilometers from east to west and a length of about 7 kilometers from north to south, and the permanent water surface rate is 12%. This project is a Class III project, mainly consisting of 2 seawalls, 2 sluices, 1 roads entering the enclosed area and rivers in the enclosed area. Beiyang levee is 6740 meters long from Xiashantou south to North Qing Ji Mountain, and Baisha levee is 330 meters long from Qing Ji Mountain to Dongxiajue Mountain. The crest elevation of the two seawalls is 7.8m, the crest elevation of the breakwater wall is 8.6m, and the crest width is 5.0m The drainage wrench is used for foundation treatment, and the moistureproof standard is once every 50 years (allowing waves to cross). Both sluices are located on the excavated weakly weathered rock foundation. The short sluice is located at the northern end of Beiyang levee, with a scale of 4m× 5 holes and a designed drainage flow of1.75m3/s. The Qing Ji sluice is located in the middle of Qing Ji sluice at the southern end of Beiyang levee, with a scale of 4m× 7 holes and a designed drainage flow of 247m3/s. The road entering the fenced area is located at the south side of the fenced area, with a road surface width of 24m. Sluice construction as of June 20 14 and 10, there are a total of large sluices (Yongning River Sluice) 1 seat in Lingjiang River Basin, with a design flow of 2,835 cubic meters per second; Medium-sized sluice 1 seat (Datian Port Sluice), with design flow of 4371m3/s; Among them, Yongning sluice has obvious flood discharge function in flood season because of its large flow, which greatly reduces the flood disaster in Huangwen Plain. Waterway shipping Lingjiang waterway is the main trunk waterway in Taizhou inland waterway network and one of the backbone waterways in Zhejiang Province. The channel starts from Songpumen at Jiaojiang Estuary and ends at Sanjiang Village, Yongfeng Town, Linhai City, with a total length of 65. 15km ... Due to the great differences in water depth, width and navigation conditions along the channel, by 2008, the channel will be divided into six sections with Pier 4, Hong Guang Wharf, Shuiyuntang Wharf, Linhai Xia Qiao Wharf and Sanjiang Village as nodes.

Pier Songpuzha 14 is located in the lower reaches of Lingjiang River, which is a section of Lingjiang River near the estuary, and the waterway is 8. 12km long. The river regime in this section is straight and the riverbed is shallow, with an average width of more than 1 1,500m, the maximum river width of more than 2,000m, the water depth of 3-6m, the main channel width of about 500m and the water depth of the channel of more than 3m, which basically meets the third-class navigation standards. Since Lingjiang used to start from Pier 4, this section has not been graded since 2008. The reach is a tidal river with irregular semidiurnal tide and obvious tidal fluctuation. The bottom of the river bed is muddy, and ships under 5000 tons can basically ride the tide, but the guarantee rate of riding the tide is low.

Pier 4-The waterway of Hong Guang Wharf is located in the lower reaches of Lingjiang River, with a waterway length of 13.5km, which is similar to that of Songpuzha 1-4, with a river width of 850- 1.700m, a main waterway width of 2 10-300m and a water depth of 3.0-. However, because the navigation clearance height of Jiaojiang Bridge is 22 meters, the height of navigable ships is limited.

Hong Guang Wharf-Lingjiang Second Bridge waterway is located in the middle reaches of Lingjiang River, with a length of 32.438+07 km. Lingjiang River is curved, and its width varies greatly. River width 160- 1300m, water depth of 3-8.8m, channel width of 75- 180m, water depth of 2.70-3.5m, and channel grade is four-level channel (including Shuiyuntang Wharf-Lingjiang Second Bridge length 1.83km). By the end of 2008, except for the insufficient bending radius of some segments, the channel basically reached the Class IV channel standard, and seagoing ships below 1000 tons can sail in the tide.

The second Lingjiang Bridge in Sanjiang Village, Yongfeng Town is located in the upper reaches of the Lingjiang River, with a river length of11.3/km, a river width of 80~ 190 m, a river width of 45 ~10 m and a water depth of about/kloc-. By 2008, it will basically reach the six-level waterway standard. Pollution situation Due to the rapid development of industry and aquaculture in the upper, middle and lower coastal areas, a large amount of wastewater is directly or indirectly discharged into the Lingjiang River Basin. In addition, the construction of a large reservoir in Xianju County in the upper reaches partially intercepted the rainwater that originally flowed into Yong 'anxi, which challenged the continuous improvement of water quality in Lingjiang River Basin. The main pollutants are volatile phenol, dissolved oxygen, chemical oxygen consumption and chloride ion.

Up to 20 10, except for the long-term and large-scale rainfall and flood discharge in the upper reaches of the reservoir, the inflow at ordinary times has obviously decreased. With the rapid development of industry and aquaculture in the upper and middle reaches of the Yangtze River, a large amount of wastewater is directly or indirectly discharged into the Lingjiang River Basin, which will have a serious impact on the continuous improvement of water quality in this area.

As of 20 10, according to the division of water environment functional zones in Zhejiang Province, the downstream monitoring section, the midstream Shuiyuntang, the upstream Sanjiang Village and the two sandy sections of Yonganxi Baizhi 'ao and Shifengxi, the main tributaries of north and south, of Lingjiang Tidal Reach, are classified as Class III water functional zones.

As of 20 13, the water quality of Yong' anxi in Lingjiang River Basin is Grade I-III; The roof section of Shifengxi generally belongs to Class II-III water, while the coastal section belongs to Class IV water, and the main over-standard item is ammonia nitrogen. Lingjiang is Class IV-V, Yicheng Port is Class II-III, and Datian Port is Class II-IV; Jiaojiang is classified as Class V; The upper reaches of Yongning River are II-III, and the lower reaches are IV-V; Baili River belongs to Grade IV-worse than Grade V, and the main items exceeding the standard include permanganate index, ammonia nitrogen and total phosphorus. Control measures 201465438+10-September, Lingjiang River Basin closed down or rectified key enterprises 178, with a completion rate of 88. 1%. Promote the construction of rural domestic sewage treatment facilities. 1 to August, 495 villages in the basin completed the construction bidding, and 348 villages entered the site for construction; Strengthen the pollution control of livestock and poultry breeding, shut down 10 18 livestock and poultry farms within 200 meters along the river in the basin, and complete the control of 759 large-scale livestock and poultry farms. Lingjiang River flows through 10 many scenic spots: Shichangkeng Reservoir, Shishe Reservoir, Longtankeng Scenic Area, Shakeng Reservoir, Lingtou Reservoir, Van Gogh Reservoir, An Xia Reservoir, Small Power Station Reservoir, Hengxi Xiangshishan Scenic Area, Qiantan Ancient Street Scenic Area, Tongjiang Academy, Xianju Green Space Ecological Camping Base, Mukouhu Forest Park and Yong 'anxi Drifting Area.

Lingjiang go on road trip can be seen along the river except for three places (Shishe Reservoir to Xixi Village, Xixi Village to Shakeng Reservoir, Van Gogh Reservoir Yong 'anxi Hydropower Station to An Xia Reservoir), which are inaccessible and need to be bypassed. Lingjiang river basin belongs to subtropical monsoon climate, with annual average precipitation1634.9mm. The rainy season is divided into rainy season and typhoon season, and the weather in these two rainy seasons is changeable, with frequent rainstorms. The average precipitation in April 4- 10/0 accounts for more than three quarters of the whole year, especially in July-September, which is often affected or attacked by typhoons, with frequent storms and floods.