【摘要】：摘要：重金屬污染物通過土壤、大氣和工業(yè)的途徑排放到水系統(tǒng)中,通過三種方式的匯聚,重金屬最終進(jìn)入到水體隨水流運(yùn)動。重金屬通過土壤向水體中擴(kuò)散是重要過程,本文引進(jìn)了多孔介質(zhì)的思想和原理,將土壤模擬成多孔介質(zhì),結(jié)合土壤自身的特點(diǎn)簡化和改良了多孔介質(zhì)的模型,最終得出了重金屬從土壤向水體中匯聚過程的數(shù)學(xué)模型。 重金屬匯聚在水體中后進(jìn)行遷移與轉(zhuǎn)換作用,在水體中同樣存在三種形態(tài)的重金屬,利用微元的數(shù)學(xué)思想,對重金屬三態(tài)在水體中的遷移和轉(zhuǎn)換建立了數(shù)學(xué)模型,并結(jié)合傅利葉及以逆算法得出模型的解析解。從單點(diǎn)源與多點(diǎn)源角度講述了兩種污染排放形式的污染模型,單點(diǎn)源二維重金屬污染物模型采用了基本的數(shù)學(xué)模型；多點(diǎn)源污染過程數(shù)學(xué)模型計算復(fù)雜并且數(shù)據(jù)量大,本文采用分段與疊加的思想,將多點(diǎn)源污染分解成多個單點(diǎn)源污染模型,最終將單個效果利用疊加算法進(jìn)行疊加,模擬出多點(diǎn)源污染過程。 以湘江為對象采用GIS技術(shù),將重金屬污染物分布式物理過程的數(shù)學(xué)模型系統(tǒng)實(shí)現(xiàn),建立湘江重金屬污染物分布式物理過程GIS系統(tǒng)。整個系統(tǒng)由管理系統(tǒng)與地圖展示兩部分組成。圖47幅,表15個,參考文獻(xiàn)50篇。
[Abstract]:Abstract: The heavy metal pollutants are discharged into the water system through the soil, the atmosphere and the industrial way, and the heavy metal finally enters into the water body to move with the water flow through the convergence of three ways. The diffusion of heavy metals into the water body through the soil is an important process. In this paper, the idea and the principle of the porous medium are introduced, the soil is simulated into a porous medium, and the model of the porous medium is simplified and improved by combining the characteristics of the soil itself. The mathematical model of the process of the heavy metal from the soil to the water was finally obtained. The heavy metal is collected in the water body for migration and conversion, and three forms of heavy metal are also present in the water body, and the mathematical model of the heavy metal three-state in the water body is established by using the mathematical thought of the micro-element, and the mathematical model is established for the migration and the transformation of the heavy metal three-state in the water body The Analysis of the Model by Using the Fourier-leaf and the Inverse Algorithm The pollution model of two types of pollution discharge is described from the point of single-point source and multi-point source, and the basic mathematical model is used for single-point source two-dimensional heavy metal pollutant model. The mathematical model of the multi-point source pollution process is complicated and the data volume is large. It is thought that the multi-point source pollution is decomposed into a plurality of single-point source pollution models, and a single effect is finally overlapped by using a superposition algorithm, so that the multi-point source pollution is simulated. A distributed physical process of heavy metal pollutants in Xiangjiang is established by using the GIS technology in Xiangjiang as the object and the mathematical model system of the distributed physical process of heavy metal pollutants. S system. The whole system is shown by the management system and the map. Composition. Figure 47, Table 15, References
【學(xué)位授予單位】：中南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：P208;X522

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