發(fā)布時(shí)間：2018-01-11 02:27

  本文關(guān)鍵詞：給水管網(wǎng)生長(zhǎng)環(huán)特征重金屬釋放及對(duì)水質(zhì)影響研究　出處：《華僑大學(xué)》2013年碩士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： 給水管網(wǎng) 管線信息系統(tǒng) 重金屬 釋放 控制措施

【摘要】：飲用水安全保障技術(shù)一直是社會(huì)關(guān)注的熱點(diǎn)之一。近年來(lái)，給水管網(wǎng)中重金屬對(duì)水質(zhì)的影響逐漸引起國(guó)際范圍的廣泛關(guān)注。國(guó)家“十一五”、“十二五”重大水專(zhuān)項(xiàng)中，針對(duì)飲用水中重金屬污染的控制技術(shù)進(jìn)行了強(qiáng)調(diào)。城市給水管網(wǎng)結(jié)構(gòu)的復(fù)雜性以及給水管網(wǎng)生長(zhǎng)環(huán)引起的重金屬釋放，涉及飲用水的水質(zhì)安全�；谙冗M(jìn)的GIS技術(shù)研究城市給水管網(wǎng)水質(zhì)變化，重金屬的釋放規(guī)律，對(duì)保障城市供水安全有重要意義。 給水管線屬性資料和空間數(shù)據(jù)是給水管網(wǎng)管理的關(guān)鍵點(diǎn)和難點(diǎn)之一。本論文針對(duì)某市A區(qū)域給水管網(wǎng)管線進(jìn)行了基礎(chǔ)性的普查工作，完善了該區(qū)的給水管線數(shù)據(jù)庫(kù)，并結(jié)合GIS開(kāi)發(fā)平臺(tái)進(jìn)行了二次開(kāi)發(fā)，進(jìn)一步建立了A區(qū)域給水管網(wǎng)信息管理系統(tǒng)。首先對(duì)給水管線信息系統(tǒng)的總體框架進(jìn)行需求性分析，對(duì)其功能模塊進(jìn)行設(shè)計(jì)，，選擇ArcGIS Engine作為二次開(kāi)發(fā)平臺(tái)。進(jìn)行管線的普查的外業(yè)數(shù)據(jù)采集和內(nèi)業(yè)資料整理，采用ArcGIS中的Access模型對(duì)數(shù)據(jù)進(jìn)行組織管理，建立數(shù)據(jù)庫(kù)，實(shí)現(xiàn)管網(wǎng)圖形和屬性信息存儲(chǔ)的一體化。最后，通過(guò)整合數(shù)據(jù)和二次開(kāi)發(fā)實(shí)現(xiàn)管線信息系統(tǒng)的管理功能。 基于A區(qū)域給水管線信息系統(tǒng)的給水管網(wǎng)圖層選取具有代表性的供水路徑，并查詢(xún)?cè)摴┧窂降墓芫�屬性信息，在此基礎(chǔ)上設(shè)置代表性管網(wǎng)采樣點(diǎn)進(jìn)行給水管網(wǎng)新舊路線現(xiàn)場(chǎng)采樣，通過(guò)現(xiàn)場(chǎng)實(shí)驗(yàn)和小試實(shí)驗(yàn)，對(duì)該片區(qū)內(nèi)的給水管網(wǎng)水質(zhì)變化規(guī)律、管道內(nèi)重金屬的釋放及其影響因素進(jìn)行了研究。研究結(jié)果表明隨著供水路線的延長(zhǎng)，各個(gè)水質(zhì)指標(biāo)都有上升的趨勢(shì)，其中重金屬砷濃度達(dá)到100μg/L，污染現(xiàn)象較嚴(yán)重。通過(guò)對(duì)該片區(qū)管網(wǎng)生長(zhǎng)環(huán)的結(jié)構(gòu)成分分析，得出生長(zhǎng)環(huán)主要構(gòu)成疏松層，后沉淀層，腐蝕層三種結(jié)構(gòu)，其中的鐵、鋅、鉛含量較高。查閱大量文獻(xiàn)選取對(duì)管網(wǎng)中重金屬釋放影響最為顯著的影響因素進(jìn)行研究分析。實(shí)驗(yàn)結(jié)果表明，管道中的重金屬的釋放量與停留時(shí)間、水中的氯離子含量、硫酸根離子含量、管道的流速呈現(xiàn)正相關(guān)關(guān)系，與pH值的變化關(guān)系較為復(fù)雜；當(dāng)管道中水流速度達(dá)1.0~1.3m/s及以上時(shí)，出現(xiàn)明顯的重金屬釋放現(xiàn)象。各種重金屬中，砷與鐵的凈釋放程度成正相關(guān)關(guān)系。通過(guò)對(duì)研究結(jié)果的分析，最終提出給水管網(wǎng)的運(yùn)行條件控制以及控制重金屬污染的建議。
[Abstract]:In recent years, the influence of heavy metals in water distribution network on water quality has gradually aroused widespread concern in the international scope. In the "12th Five-Year Plan" major water project, the control technology of heavy metal pollution in drinking water is emphasized. The complexity of urban water supply network structure and the heavy metal release caused by water supply network growth ring are emphasized. Based on the advanced GIS technology, it is of great significance to study the changes of water quality and the release of heavy metals in urban water supply networks. Attribute data and spatial data of water supply pipeline line are the key points and difficulties of water supply network management. In this paper, the basic survey work of water supply network pipeline in A area of a city has been carried out. The database of water supply line in this area is perfected, and the secondary development is carried out on the basis of GIS development platform. The information management system of A area water supply network is further established. Firstly, the overall framework of the water supply line information system is analyzed, and its function module is designed. ArcGIS Engine is chosen as the secondary development platform to collect the data from the field and collate the data of the internal industry in the pipeline survey. The Access model in ArcGIS is used to organize and manage the data, establish the database, and realize the integration of pipeline network graphics and attribute information storage. Finally. The management function of pipeline information system is realized by integrating data and secondary development. The typical water supply path is selected based on the A area water supply pipeline information system, and the pipeline attribute information of the water supply path is queried. On the basis of this, the representative sampling points are set up to sample the new and old routes of the water distribution network on the spot. Through the field experiments and small scale experiments, the water quality of the water distribution network in this area is changed. The release of heavy metals in the pipeline and its influencing factors were studied. The results showed that with the extension of the water supply route, the water quality indexes had an upward trend, and the arsenic concentration of heavy metals reached 100 渭 g / L. The pollution phenomenon is serious. By analyzing the structure composition of the growth ring of the region pipe network, it is concluded that the growth ring mainly consists of loose layer, post-precipitation layer and corrosion layer, among which iron and zinc. A large number of literatures were consulted to select the most significant influence factors on heavy metal release in pipeline network. The experimental results showed that the release of heavy metals and residence time in pipeline. The content of chloride ion, sulfate ion content and the flow rate of the pipe show a positive correlation, and the relationship with the pH value is more complex. When the flow velocity in the pipeline reaches 1.0 ~ 1.3 m / s and above, there is a significant release of heavy metals, especially in all kinds of heavy metals. There is a positive correlation between the net release of arsenic and iron. Through the analysis of the results of the study, the control of the operating conditions of the water supply network and the suggestions for controlling heavy metal pollution are put forward.
【學(xué)位授予單位】：華僑大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類(lèi)號(hào)】：TU991.21

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