Environment Impact Assessment For Jiangxi Shangrao Sanqingshan Airport Beijing Guohuantiandi Environmental Technology Development Center. Ltd. Oct. 2012 Content
Impact analysis of Surface Water Environment and Mitigation Measures
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- 4.4.2.1 Main source of wastewater
- 4.4.2.2 Impact analysis of environment
- 4.4.3.1 Impact analysis of airport wastewater
- 4.4.3.2 Impact analysis of farmland irrigation and measures
4.4 Impact analysis of Surface Water Environment and Mitigation Measures4.4.1 Impact analysis and measures for airport rain discharge According to the engineering Design unit China Civil Aviation Airport Construction Group and Shangrao City Water Power Survey and Design Institute for research, Shangrao Sanqingshan Airport field higher, there is no flood on the field to harm, after the project construction, the main consideration due to machine field covers an area of the change of the regional primary catchment, Airport and external drainage of the drainage area downstream impacts, water Design unit mainly considering off-site drainage design mainly is to ensure that the airport field all the drainage outlet external drainage unobstructed, make area rain water discharge as soon as possible outside, and safety discharged outside the existing waterways, not be caused by the airport drainage caused floods and landslides and other geological disasters. The airport on-site and off-site design follows rain: (1) On-site drainage design According to the Jiangxi Shangrao Sanqingshan Airport project feasibility study report (Draft), the airport has 8 floors in total drain outlet and 1 drainage culvert, each outlet flow calculation according to the worst flood in 5 years, each outlet floor partition area and drainage flow are shown in table 4-4-1, for each outlet location and dark letter, see Figure 4-4-1. Table 4-4-1 Table for drainage flow of each outlet of the airport
(2) Design of off-site drainage 1. Off-site drainage Overview According to the each outlet and drainage culvert location, combined with the status quo of terrain, the water outlet is divided into two types: one is directly discharged into drainage channel along the sidelines gully or streams; another kind is discharged into the nearby reservoir or pool, and to supplement their is occupied by part of the catchment area of the airport runoff. Drainage types and lines of each outlet are detailed in Table 4-4-2 and Figure 4-4-2. Table 4-4-2 Table for drainage channel line for each outlet of the airport
The above each outlet into reservoir, pool or gully, the catchment area of the airport covers effects decrease, through airport drainage port settings, can return all or part of the catchment area. But also has a partition area of over was the airport occupation area, in this case need to review the outlet downstream of the reservoir or pool spillway the release flood waters and downstream gully status of drainage capacity, if it does not meet the requirements, should adopt relevant measures to solve, ensure that the off-site drainage security. 2. Problems existing in off-site drainage system According to the investigation, each outlet was the airport occupation of catchment area. See table 4-4-3 for catchment area partition return comparison. Table 4-4-3 Comparative table for each outlet of the airport in occupation and partition return water catchment area
From table 1-3 we can see, the catchment area is less than the water outlet 3 division occupied the catchment area, water outlet 5 partition area and catchment area of the same, and downstream for small reservoir, will increase the downstream pool discharge pressure, do not need to take special measures; outlet 1, 2, 4, 6, 8 floor area catchment area are larger than is occupation of the catchment area, including 1, 2, 6 water outlet of the genus pool, itself a smaller increase in catchment area, catchment area, need to widen the spillway, to ensure that the pool flood safety; water outlet 4, 8 species of the genus gully, to increase the collection of water product will increase downstream section pressure release flood waters, whether the gully measures required as the present situation of gully release flood waters ability. See Table 4-4-4 for downstream gully discharge capacity and discharge flow comparison of each outlet. Table 4-4-4 Table for comparison of downstream gully discharge capacity and discharge flow of each outlet
From the table we can see, a water outlet 2, 6, 8 downstream gully release flood waters capacity does not meet the requirements of P=20% flood after the completion of the airport, need to undertake to its widening and reinforcement processing. 3. Opinions and measures for treatment of off-site drainage system The above situation, on the each outlet downstream of pool and gully release floodwaters (canal) opinion summary measures are shown in table 1-5. Table 4-4-5 Table for treatment measures for each outlet of the airport downstream pool and discharge gully (canal)
Treatment measures : drainage outlet immediately after the release flood waters channel (canal) to set the C25 reinforced concrete stepped energy dissipation section, long 30m; to expand after the drainage ditch on both sides (canal) by M7.5 masonry retaining wall lining, the bottom of 100mm thick C15 concrete lining. (4) Impact analysis of airport rain drainage According to the analysis above, the airport water efflux, outlet 1, 3, 4, 5, 7 discharge outlet downstream can meet the ability to release flood waters, 2, 6, 8downstream gully release flood waters capacity does not meet the requirements, we should carry on the widening and reinforcement treatment, in the above three is followed by a ditch after taking measures to release flood waters, ensuring that the airport construction after the rainwater will not have a significant impact on downstream.
Construction period, due to space cleaning, pipeline laying, concrete mixing, building installation project, will produce a certain amount of construction waste water and waste water. The construction site to produce an effluent containing large amounts of silt, especially during the rainy season, the site will have a large number during construction. The sewage sedimentation tank of construction site shall be set, so that the construction of sewage after being deposited silt discharge, thereby reducing the emissions. In addition, due to the construction period will need a large number of construction personnel, during the construction, construction personnel daily life will produce a certain amount of water. According to the statistics, the general construction and sewage water as shown in Table 7-2-1. It can be seen that construction activities of main pollutants in sediment suspended particles for sewage; sewage containing relatively large quantities of organic matter and suspended solids. Table 7-2-1 Water quality of wastewater during construction period Unit: mg/L
4.4.2.2 Impact analysis of environmentConstruction area set sedimentation tank, the drainage into the sedimentation tank after precipitation the upper clean water can be used for the construction site dust, vehicle cleaning operations. Washing sand stone, concrete mixing and conveying equipment flushing waste water can be recycled without discharging into the settling tank. In the construction site within the set of aqua, living wash and restaurant wastewater take the centralized collection way, by the sedimentation for field of dust. 4.4.3 Impact analysis of water environment during operation 4.4.3.1 Impact analysis of airport wastewater(1) Domestic sewage and industry wastewater Wastewater from sewage and wastewater is composed of two parts, mainly for the domestic sewage source: terminal building, office building, living area, air traffic control building and sewage. Shangrao Airport operation target years airport sewage discharge of 57.96m3/d, this phase of the project of a new treatment scale of 10m3/h sewage treatment station, using MBR processing technology, can meet the needs of the airport all sewage and wastewater treatment and wastewater treatment station effluent water quality can meet the demand for reuse. Treatment of sewage after qualified 29.05m3/d is used for washing, flushing, surplus sewage discharged into the sewer through matching of municipal sewage treatment plant in Shangrao City, Urban Management Bureau of Shangrao City has promised to construction of the airport to current status municipal sewage pipe network drainage pipeline in airport, prior to the completion of advance the completion of the airport, supporting the sewage discharge pipeline along the Airport Road municipal pipe network laying, access and sewage pipeline to see Figure 4-4-3. Therefore, under normal circumstances the airport sewage generated not on the peripheral surface water impact. (2) Initial rain Airport fuel tank area's initial rainwater directly into the rainwater system to the peripheral surface water impact assessment requirements, fuel tank area collection tank cofferdam of initial rainwater tank cofferdam, effective volume greater than 500m3. airport early rain ( rainfall began 15 min after rain ) can enter the cofferdam, the initial rainwater by fuel tank area oil-water separator pre after treatment, can enter the airport sewage treatment station for further processing, not into the external environment. (3) Measures to Reduce Surface Water Environment Effects during the Operation Period Waste water of airports mainly contains sanitary sewage as well as little production waste drainage, oil depot washing waste water and fire control waste water. The sewage can be processed by the sewage treatment station, with part of it reused for toilet rush and vehicle washing and the other part drained into the local sewage plant. Comprised of terminal sewage and staff sanitary sewage, the sanitary sewage can be pre-processed by the digestion tank and then processed by the sewage treatment station. With a high percentage of BOD5, COD, SS and lipa, catering sewage from dining rooms needs to be pre-processed by oil separator and then processed by the sewage treatment station through the sewers. When oil depots or oil tanks are used for water draining, it should go into an oily water separator for pre-processing due to the high thickness of oil. The separated aviation kerosene can be degraded for recycled use and the pre-processed low-oil-thickness sewage can go into the sewage treatment station for further processing to meet the standard of emission. Oily washing waste water and oil depot fire control waste water mainly come from the oil tank area and the petrol filling station, running into the oil depot cofferdam and finally processed by the sewage treatment station. In view of the local climate and overall layout of the airport land, a geological integrated biochemistry sewage treatment facility will be used for sewage treatment. In this phase, we plan to build a sewage treatment device with the treatment scale of 10m3/h. MBR deep treatment technology can well process airport sewage which mainly includes sanitary sewage, with each pollutant density of the processed sewage meeting the corresponding requirements of Civil Sewage Regeneration and Reuse and Civil Varied Water Quality (GB/T18920-2002). According to the Opinions on Improving Industrial Water Saving Work of State Economic and Trade Commission (State Economic and Trade Commission No. [2000]1015), airport sewage should be recycled for use after deep processing so as to save water. Intermediate water can be used for internal toilet rush and vehicle washing after deep processing. Membrane Bioreactor (MBR) is a new type of sewage treatment technology integrating membrane separation technology and biochemistry processing technology. It keeps good oxygen or activated sludge of the anaerobic system within the reactor through filtering by using the membrane micropores, so as to improve the degradation efficiency of COD, BOD and other pollution factors through increasing the density of activated sludge and the sludge age, and to meet the corresponding water using standards required in Civil Sewage Regeneration and Reuse and Civil Varied Water Quality (GB/T18920-2002). The existing Shangrao Jiangbei Sewage Plant is located in Xuri Village, Xuri Town, Shangrao County. It is 5km away from the downtown and can process 80,000m3/d, with a sewage treatment rate of 90.29%. It still has capacity for airport sewage treatment and can drain the processed airport sewage into Xinjiang River under the dam (locations of the sewage plant and the outfalls shown in the previous Figure 4-4-3). The pipeline network of the sewage plant has covered Zhimin Avenue in the north of the airport (the starting point of the airport approach road meets with the Zhimin Avenue). The designed indices of inlet water quality of Jiangbei Sewage Plant are COD300mg/L, SS160 mg/L, ammonia nitrogen 40 mg/L and BOD150 mg/L. The sewage emission of this project is 28.91m3/d, which comes from the airport sewage treatment station after processed and hence the quality can meet the civil varied water standard and the inlet water quality requirements of the civil sewage plant. The airport avenue currently ready to construct will connect Zhimin Avenue and the airport. The sewage pipeline paved along the airport avenue has been designed to use 4.7km long 400mm-800mm pipes to collect and lead the airport sewage into the civil pipeline network and finally into the Shangrao Jiangbei Sewage Plant.
Sanqingshan Airport is located in the region of low hill, elevation between 90m-116m, field area is relatively flat, height difference is smaller. Site located in a basin watershed near the centre line of a runway, the ground elevation of high, low both sides, site area with large surface water system. Based on investigation, the airport around the distribution of a small reservoir (Sanba reservoir) and 36 pools. These little pool reservoir Xinzhou District Maojialing Village belonging to Shangrao County, Zunqiao Village and Zaotou Town, mainly used for the respective downstream farmland irrigation, in which Zunqiao Village Xiawutang pool is the source of drinking water, drinking water for 40 households of villagers. See Table 4-4-7-4-4-9 for name and function of each pool and reservoir surrounding the airport. Table 4-4-7 List of pool conditions in range of Shangrao County Zunqiao Village
Table 4-4-8 List of reservoir and pool conditions in the range of Shangrao County Zaotou Town
Table 4-4-9 List of pool conditions in the range of Xinzhou District Maojialing Village
Since the airport's construction of the above pool and reservoir effects can be roughly divided into the following several kinds of situations: (1) Pool and downstream irrigation farmland were all occupied; (2) Pool whole or in part occupied, downstream irrigation farmland remains; (3) Pool catchment area in whole or in part is occupied, pool itself and its downstream farmland was retained. The first case of land requisition and content, there is no irrigation problems; after two cases due to farmland still, there are irrigation needs, which belongs to the project to solve the problem. (2) Solution discuss For the second cases, the project plans to take two measures for downstream of irrigation area is larger and more concentrated, considering from the nearby water sufficient water to open a new channel for irrigation; for the downstream irrigation area smaller and more dispersed, the proposed project construction directly to its commandeer or will change dryland farming in paddy field, and give the corresponding compensation. For the third cases, the design proposal to adjust or increase the airport site drainage outlet, through the pit drainage area division, to return with the pool occupied part of the corresponding area of the catchment area, with supplemental irrigation runoff. The top two ways to still cannot solve, suggested in the affected farm near the location of the new pool, as a source of irrigation water. Of course, the new pool must not affect airport infrastructure and operation safety under the conditions. Due to the current source alternatives based on the existing hard to finally determine the project irrigation alternatives in environmental management framework document (EMF). Directory: curated curated -> Concept stage curated -> Concept stage curated -> Republic of Côte d'Ivoire Urbanization Review curated -> Report No: aus11011 Central America curated -> Report No. 94474-pk fiscal Disaster Risk Assessment Options for Consideration curated -> Environmental and Social Management Framework for the Costa Rica Telecommunications Sector Modernization Project curated -> Growth through Innovation An Industrial Strategy for Shanghai By Shahid Yusuf Kaoru Nabeshima April 22nd, 2009 curated -> Report No: 70178. People's Republic of China curated -> Making Nutrition Policy Central to Development Understanding the Political and Institutional Conditions for Policy Change Case Study of the Political Economy of Nutrition Policies in Ethiopia Prepared By Download 3.9 Mb. Share with your friends:
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