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Study on the Groundwater Environment Simulation of City’s Wellfield and the Countermeasure of Feeding Water Supplyment

Author: LiBin
Tutor: WangKaiZhang
School: Shandong Agricultural University
Course: Environmental Science
Keywords: wellfields Aqua3D numerical simulation groundwater environment safety water supply
CLC: TU991.11
Type: Master's thesis
Year: 2007
Downloads: 358
Quote: 1
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Abstract


The Dongwu wellfield is located in the middle of Dawen river in Shandong province, remained with Daiyue borough in Taian city.The wellfield distributing in the alluvial bajada of the southeast mountain in the Dawenkou basin. The landform can be described south higher than north, east higher than west, which is eight kilometer in long and three kilometer in width.It is a main wellfield in Taian city.There accumulated quite thick loose alluvium in special sedimentary condition since Quaternary. That formed a special hydrogeological element, which had a integrated reentry、flow-off、water drain condition and offered favorable interspaces for groundwater’s provision and migration.In recent years, the mining yield has been gradually accreted increased in order to meet the needs of water used for flying development of economic in Taian city. That bring on the groundwater level declining, the groundwater reentry、flow-off、water drain condition change slowly. In the same time, Dawen River, which is the main influent of water, the water quality and quantity, is not so good. It must affect the water quality and quantity in Dongwu wellfield. Therefore external groundwater evaluation and safe water supply countermeasures becomes the key to keep wellfield available. This article collected hydrogeological data of Dongwu waterhead, based on streaming flow and solute migration equations, used Aqua3D software to simulate groundwater, constituted Dongwu wellfield groundwater 3D system former. I used validated former to estimate the groundwater in Dongwu wellfield and got four productions.（1） I set up hydrogeological concept and math former of Dongwu groundwater based on geology section and broach data and set up numerical value former. I adjust the parameter、run and identify again and again until my former achieve the same as hydrogeological element. My former supply scientific thereunder for the management in Dongwu wellfield.（2） I choose the nature hydrogeological borderline （for example faultage and surface water） as the former’s borderline.The former’s calculational area.20km2. Recent studies show that in nowaday and most allowed exploitation condition, the groundwater level will drop in 2020, the same area’s water level will drop more than five meter. The lowest water level will not get the karst water apical plate height mark, so that can’t beget geologic environment problem.（3） I dope out the nitrite consistency of pore water and karst water in Dongwu wellfield and Dawenkou town based on the current and solute migration former.The former forecast mining as the actuality in the main water supply section, the nitrite consistency of pore water will be 0.03mg/L in 2010, 0.035mg/L in 2015, 0.05mg/L in 2020. The former forecast mining as the tiptop, the nitrite consistency of pore water will be 0.03mg/L in 2010, 0.037mg/L in 2015, 0.052mg/L in 2020. The nitrite consistency of karst water will be 3×10-10-10mg/L in 2010, 3.6×10-10-10mg/L in 2015, 4.8×10-10-10mg/L in 2020. The former forecast mining as the tiptop, the nitrite consistency of karst water will be 5×10-10-10mg/L in 2010, 5×10-10-10mg/L in 2015, 1×10-9mg/L in 2020.The former forecast mining as the actuality in Dawenkou town, the nitrite consistency of pore water will be 0.03mg/L in 2010, 0.045mg/L in 2015, 0.07mg/L in 2020. The former forecast mining as the tiptop, the nitrite consistency of pore water will be 0.03mg/L in 2010, 0.05mg/L in 2015, 0.08mg/L in 2020. The nitrite consistency of karst water will be 0.02mg/L in 2010, 0.03mg/L in 2015, 0.06mg/L in 2020. The former forecast mining as the tiptop, the nitrite consistency of karst water will be 0.03mg/L in 2010, 0.047mg/L in 2015, 0.07mg/L in 2020.（4） I get the evaluation for the safety standards and carve up wellfields protective area based on the former and actual circumstances of the wellfield. I also bring forward idiographic protective engineering and administrant layout. These propose bring forward countermeasure for water supply safety and durative development.

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CLC: > Industrial Technology > Building Science > Municipal Engineering > Water supply project ( on the Water Works ) > Water Intake Project > Water
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