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Groundwater quality in Panjin City,ghd iv styler, inspection and evaluation of FUZZY

Quality of fuzzy sets the degree of pollution cut into five general sets,ghd stijltang iv, namely: A ★ = {Iua (u) ≥ 0.90} B ★ = u10.40 ≤ / LA () <0.90} C ★ = { 10.40 ~ <uA (u) <0.70} D ★ = {10.20 ~ <uA (u) <0.40} E ★ = {I / $ A () <0. 20} to determine the test sample and water quality standards is most similar to that of the sample belongs to the first level. And the distance calculated based on the following formula = I2SI-I Fuzzy concentrated elements of which the standard /. Z's membership. Fuzzy focus on water as a unit element /. Z's membership. And S is the power. Because the water in the unit, the evaluation factor for the classification of the main symbol, so using the following weight distribution (proportional to the square relationship between the size and level) S. = (S1, S2, S3, S4, S5) = (0.01,0.04,0.10,0.18,0.27,0.40) 【】 2004-03-03 【Received Date of Introduction】 Tang Yufu (1962 -), male, Yingkou, Liaoning, engineers, mainly in hydrology and water resources research. WATER Mexico ---- l0 of 2004 (Volume 22, 243) where Si = 1 on a unit water samples, obtained by the corresponding fall Fuzzy set is 1-31 + fall +++,= 12345 figure it out with 13 standard Fuzzy Sets Fuzzy distance: 1 = 0.58, = 0.73, D ~ 3 = 0.86,4 = 0.61,94 = 1.01, = 1.05, D, 7 = 0.93,: 0.97, = 0.78,10 = 0.65,11 = 0.53,2 = 0.75,3:0.88, more informed, = 0.53 minimum, thus determine the unit of water is 501 Huan grade Ⅲ water quality. We also calculated the same way at 16 = 0.86, belonging to Grade Ⅱ water, yellow = 0.93, 11 belong to Class I water. The other evaluation results (on the next page 32) method was consistent, effective. 3 Conclusion \This paper, fuzzy mathematics is applied to the regional water quality, groundwater pollution evaluation in the past. Evaluation results show that: (1) describe the water quality classification with limits of membership functions, noting the fact the description of boundaries, so that the evaluation closer to the objective. (2) The method can be used to evaluate the various parameters. (3) to consider various parameters of the role of pollution in general, and given different weights. The method is simple to use, and evaluation of high precision. Less than 8%). The choice of non-woven filter effects has a great influence, should be set in accordance with soil properties, water permeability, aiming to halt the three principles of design selection, see \The results, select 400g/m2 acupuncture nonwovens. Lap joints with non-woven form, lap width of not less than 10cmo white pit reservoir reinforcement be completed in late 2001. After two years of operation observed, anti-seepage effect more apparent. Disappearance of water behind the dam or swamp, the water table down to 1.5m below the reservoir meets the design requirements, and achieved great economic and social benefits. Seeking acceptance in a timely manner, after passing before the next procedure. (3) construction site should be smooth and clean, to prevent damage to the geomembrane; laying should be smooth, elastic moderate. Rough terrain, soft soil and water should be properly laid lap width increases. (4) shall not wear hard-soled shoes laying operation. (5) maximize the use of wide, so that film at least in the construction joints; the weight of material per volume should not exceed 1t; membrane and the membrane is connected, should be the same geomembrane. Dam should be perpendicular to the dam axis laying, low dam should be laying parallel to the dam axis, in order to reduce the amount of stitching; joints should be parallel to the direction and the maximum tension. 3 Geosynthetics in Construction Problems in 4 Conclusion (1) transport, storage shall not contamination, rain, broken away from the fire, surrounded by may not have acid, alkali and other corrosive media, not the long-term exposure and upright . (2) material comes into play, should be carried out sampling. Construction should be a personal check clear the base at any time, the direction of material placement, materials, or lap joints, materials and structures connected, each process should be designed to complete a composite geomembrane rockfill dam is still in Xinjiang first, its successful application for the design of rockfill dam seepage provides a new idea. Secondly, non-woven composite geomembrane and the library in the dangerous reinforcement achieved gratifying results. Reinforcement Design for dangerous library has accumulated rich experience. A large number of water conservancy construction in the future should be to promote the use of geosynthetics and strengthen the testing and application research.