發(fā)布時(shí)間：2017-12-31 00:11

  本文關(guān)鍵詞：盤(pán)錦市X石油化工廠地下水環(huán)境影響及預(yù)測(cè)研究　出處：《吉林大學(xué)》2017年碩士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： 石油化工 地下水 環(huán)境影響及預(yù)測(cè)評(píng)價(jià) 數(shù)值模擬

【摘要】：本文在收集已有的地質(zhì)、水文地質(zhì)相關(guān)資料的基礎(chǔ)上,開(kāi)展了資料分析、現(xiàn)場(chǎng)踏勘與調(diào)查和環(huán)境影響因素識(shí)別,對(duì)擬建項(xiàng)目廠區(qū)及周邊相關(guān)區(qū)域進(jìn)行1:5萬(wàn)水文地質(zhì)測(cè)繪,并補(bǔ)充必要的勘察試驗(yàn);開(kāi)展枯、豐、平水期地下水水位統(tǒng)測(cè)和水質(zhì)監(jiān)測(cè)工作,進(jìn)行地下水環(huán)境現(xiàn)狀評(píng)價(jià);通過(guò)上述工作,查明調(diào)查研究區(qū)的環(huán)境水文地質(zhì)條件、污染源狀況、地下水開(kāi)采利用現(xiàn)狀與規(guī)劃;并通過(guò)建立地下水流數(shù)值模型對(duì)項(xiàng)目運(yùn)營(yíng)期可能發(fā)生的風(fēng)險(xiǎn)事故進(jìn)行污染物運(yùn)移模擬,結(jié)合項(xiàng)目實(shí)際提出地下水污染分區(qū)防滲措施,同時(shí)提出了地下水監(jiān)測(cè)計(jì)劃及風(fēng)險(xiǎn)事故應(yīng)急響應(yīng)措施。通過(guò)一系列研究,主要得到以下結(jié)論:1、環(huán)境水文地質(zhì)現(xiàn)狀根據(jù)研究區(qū)地下水含水介質(zhì)、形成條件、賦存特征及其在水平與垂直方向的變化規(guī)律,可將其劃分為第四系松散巖類(lèi)孔隙水和新近系孔隙、裂隙層間水兩大類(lèi)型。其中第四系松散巖類(lèi)孔隙水在平原上部第四系地層廣布,為孔隙水賦存的廣闊空間,可進(jìn)一步劃分為淺層潛水-微承壓水和深層承壓水兩個(gè)亞類(lèi),淺層潛水-微承壓水含水層巖性主要為中細(xì)砂、粉細(xì)砂,厚度為32 60m。滲透系數(shù)2-5m/d,水位埋深0.4 2.7m,富水性中等,降深5m時(shí),單井涌水量200-1000m3/d;深層承壓水含水層廣泛分布于淺層水含水層之下,巖性為粉細(xì)砂、中細(xì)砂、中粗砂、細(xì)砂、砂礫石混土等,厚度60-150m,滲透系數(shù)0.98-10.01m/d,降深5m時(shí),單井涌水量100-1000 m3/d。本次地下水質(zhì)量現(xiàn)狀評(píng)價(jià)共設(shè)置水質(zhì)取樣點(diǎn)8個(gè),現(xiàn)狀評(píng)價(jià)共選取了25項(xiàng)評(píng)價(jià)因子,按照豐、平、枯不同水期進(jìn)行評(píng)價(jià),評(píng)價(jià)結(jié)果表明,多數(shù)井溶解性總固體、高錳酸鹽指數(shù)、氯離子和錳超標(biāo)。硫酸鹽、氟化物、氨氮、鐵偶有超標(biāo),其他特征污染物汞及有毒重金屬等未超標(biāo)。2、地下水環(huán)境影響地下水污染預(yù)測(cè)結(jié)果表明,建設(shè)項(xiàng)目建設(shè)階段和運(yùn)行階段,在正常狀況下,建設(shè)項(xiàng)目對(duì)地下水環(huán)境沒(méi)有明顯的影響。本次進(jìn)行了1種具有較大潛在污染情景下的不同污染物的運(yùn)移數(shù)值模擬,模擬結(jié)果顯示,在項(xiàng)目服務(wù)期內(nèi),不會(huì)對(duì)廠界外水體造成影響;對(duì)淺層地下水有一定的影響,影響深度一般只到達(dá)30m左右,僅非正常狀況下管線(xiàn)破裂時(shí)污染物到達(dá)含水層較大深處,約60m左右,亦未穿透該淺層含水層,不會(huì)對(duì)深層地下水造成不利影響。3、地下水環(huán)境污染防控措施根據(jù)地下水環(huán)境影響評(píng)價(jià)結(jié)論,結(jié)合項(xiàng)目實(shí)際提出了地下水污染分區(qū)防滲措施,分別提出了施工期、運(yùn)營(yíng)期地下水污染防滲措施,同時(shí)提出了地下水監(jiān)測(cè)計(jì)劃及風(fēng)險(xiǎn)事故應(yīng)急響應(yīng)措施,上述措施技術(shù)可行、經(jīng)濟(jì)合理。
[Abstract]:Based on the existing geological, hydrogeological and related data, the data analysis, field survey and environmental impact factor identification are carried out in this paper. To carry out 1: 50 000 hydrogeological surveying and mapping of the proposed project plant area and its surrounding areas, and to supplement the necessary survey and test; To carry out the groundwater level monitoring and water quality monitoring during the dry, abundant and normal periods to evaluate the groundwater environment; Through the above work, to find out the environmental hydrogeological conditions, pollution sources, groundwater exploitation and utilization status and planning in the investigation and research area; Through establishing the numerical model of groundwater flow, the pollutant transport simulation is carried out on the risk accidents that may occur during the operation period of the project, and combined with the actual situation of the project, the anti-seepage measures of groundwater pollution zonation are put forward. At the same time, the groundwater monitoring plan and emergency response measures are put forward. Through a series of studies, the following conclusions are obtained: 1. The environmental hydrogeological condition is formed according to the groundwater water-bearing medium in the study area. The occurrence characteristics and their changes in horizontal and vertical direction can be divided into Quaternary loose rock pore water and Neogene pore. The pore water of the Quaternary loose rock is widely distributed in the upper Quaternary strata of the plain, which is a wide space of pore water. It can be further divided into two subgroups: shallow phreatic water and micro confined water and deep confined water. The lithology of shallow phreatic micro confined water aquifer is mainly medium fine sand and fine silt. The permeability coefficient is 2 ~ 5 m / d, the water level is 0.4 ~ 2. 7 m, the water level is rich in water, and the depth is 5 m, the water inflow of a single well is 200-1000m3 / d; The deep confined water aquifer is widely distributed under the shallow water aquifer. The lithology of the aquifer is silty sand, medium fine sand, medium coarse sand, fine sand, gravel mixed soil and so on. The thickness of the aquifer is 60-150 m. When the permeability coefficient is 0.98-10.01 m / d and the depth is 5 m, the water inflow of a single well is 100-1000 m3 / d. Eight sampling points have been set up for the present evaluation of groundwater quality. A total of 25 evaluation factors were selected for the present situation evaluation. The results showed that the dissolved total solids, permanganate index, chloride ions and manganese were in excess of the standard. Fluoride, ammonia nitrogen, iron occasionally exceeded the standard, other characteristic pollutants such as mercury and toxic heavy metals do not exceed the standard. 2. The groundwater environment impact groundwater pollution prediction results show that the construction project construction stage and operation stage. Under normal conditions, the construction project has no obvious impact on the groundwater environment. In this paper, the transport of different pollutants under a relatively large potential pollution scenario is simulated, and the simulation results show that. During the service period of the project, it will not affect the water body outside the factory boundary; It has a certain influence on shallow groundwater, the influence depth is only about 30 m, and the pollutant reaches to the deep of aquifer when the pipeline ruptures under abnormal condition, about 60 m. Also did not penetrate the shallow aquifer, will not cause adverse effects on deep groundwater .3. groundwater environmental pollution prevention and control measures based on groundwater environmental impact assessment conclusions. Combined with the actual situation of the project, the anti-seepage measures of groundwater pollution zoning are put forward, and the anti-seepage measures of groundwater pollution during construction period and operation period are put forward respectively, and the groundwater monitoring plan and emergency response measures are also put forward. The above measures are feasible in technology and reasonable in economy.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：X82;X523

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