金佛山地區(qū)地下水與地表水水文地球化學(xué)及氫氧同位素特征分析
發(fā)布時間：2018-07-14 16:53
【摘要】：水是人類賴以生存的寶貴資源,地下水是水資源的一個重要組成部分。在可利用的水資源中,地下水占98.5%。賦存于各種巖溶空隙中的地下水便是巖溶水,巖溶地區(qū)占全球陸地面積的15%,全球至少10億人口居住于巖溶區(qū)或者以巖溶水作為主要的供水水源。伴隨著人類活動的增加,巖溶水的污染和水資源的浪費問題日漸凸顯,合理開發(fā)利用及保護地下水資源變得愈發(fā)重要,這就要求人們需要弄清地下水的時空變化規(guī)律及水循環(huán)模式。本文選取重慶市南川區(qū)金佛山地區(qū)作為研究對象,以區(qū)域自然地理及水文地質(zhì)條件為基礎(chǔ),結(jié)合水文地球化學(xué)及環(huán)境穩(wěn)定同位素的方法,系統(tǒng)地對金佛山地區(qū)水化學(xué)特征的變化規(guī)律及氫氧同位素的空間分布進行分析,并進一步探究該地區(qū)存在的地下水及地表水的補給形式及循環(huán)特征,得出主要結(jié)果如下：(1)區(qū)內(nèi)水體水文地球化學(xué)組成表明水化學(xué)類型為HCO3-Ca型和Ca(Mg)-HC03型,體現(xiàn)出了區(qū)內(nèi)碳酸鹽巖廣布的特點。金佛山地區(qū)地表水與地下水的水化學(xué)組成分布于巖石風化控制端元附近,表明金佛山水體受到巖石風化控制作用較為顯著,這與區(qū)內(nèi)水體陰陽離子組成表現(xiàn)出了一致性。區(qū)內(nèi)地下水pH值呈弱堿性,金佛山自然保護區(qū)外總硬度與總堿度比值整體高于保護區(qū)內(nèi),表明區(qū)內(nèi)可溶巖的溶解過程受到其他酸類影響,個別取樣點受到人為酸影響較為明顯。與上世紀70年代比較,金佛山地區(qū)保護區(qū)內(nèi)外的地下水總硬度與總堿度比值均存在上升的情況,保護區(qū)外上升幅度較大。Ca2+及Mg2+含量明顯受到排泄點地質(zhì)背景控制,分布于灰?guī)r地層的地下水排泄點Ca2+明顯較高,地質(zhì)背景為白云巖地層的地下水排泄點Mg2+含量明顯高于其他地區(qū),可見影響金佛山地下水陽離子濃度的因素主要為地質(zhì)背景,其次為人類活動影響。金佛山地區(qū)地下水HCO3-、Cl-、 N03-、SO42-等陰離子濃度較上世紀70年代均產(chǎn)生了不同程度的變化,其主要的影響因素為人類活動。(2)金佛山地區(qū)地表河水及地下水氫氧同位素組成沿重慶市大氣降水線與全球大氣降水線附近分布,受同位素動力分餾效應(yīng)影響,存在著不同程度的偏離,而位于其左上方,地下水位置較為集中而河水較為分散,表明金佛山地區(qū)地表水及地下水主要補給來源為大氣降水及冰雪融水。通過分析區(qū)內(nèi)地下水d值(氘過量值)發(fā)現(xiàn),區(qū)內(nèi)山下低海拔地區(qū)地下水與山上高海拔地區(qū)地下水相比d值較小,說明高海拔地區(qū)地下水由于受到冰雪融水補給,體現(xiàn)出冰雪融水氫氧同位素偏負的特點。分析沿地表徑流方向選取的流域徑流系統(tǒng)水體,在溶濾作用、陽離子交換作用及同位素高程效應(yīng)影響下,地下水變化表現(xiàn)為電導(dǎo)率沿徑流方向逐漸升高而氧同位素逐漸偏重。其中地下水的電導(dǎo)率(EC)總體上高于地表水,主要原因是地下水在循環(huán)過程中對圍巖的溶濾作用及陽離子交換作用與地表水相比較更容易進行,導(dǎo)致電導(dǎo)率上升。(3)通過水化學(xué)及氫氧同位素數(shù)據(jù)分析建立金佛山地區(qū)水體循環(huán)概念模型：在金佛山1267m～2133m的高海拔地區(qū),大氣降水以降雨及降雪的形式進入金佛山水體循環(huán)系統(tǒng)。降水在下滲補給地下水的過程中受蒸發(fā)效應(yīng)影響,使得地下水逐漸富集重同位素。地下水運移過程中,部分地下水經(jīng)過淺循環(huán)形成冷泉出露于地表,而部分地下水則繼續(xù)下滲,逆著地溫梯度進行滲透,隨著溫度升高導(dǎo)致水分子平均運動速度加快,水體出現(xiàn)同位素分餾,最終在深部形成同位素組成偏負的地下熱水,地下熱水隨后上升與其他冷水混合出露地表形成溫泉。高山地區(qū)下滲的部分地下水通過較長跨度的運移過程,在山下較遠區(qū)域出露,與當?shù)亟邓a給的地下水表現(xiàn)出較大的同位素組成差異。
[Abstract]:Water is a valuable resource for human survival, and groundwater is an important part of water resources. In the available water resources, ground water, which accounts for 98.5%. in various karst spaces, is karst water, and the karst area accounts for 15% of the global land area. At least 1 billion people live in the karst area or take the karst water as a part of the world. The main water supply source. With the increase of human activities, the pollution of karst water and the waste of water resources are becoming more and more important. It is becoming more and more important to rationally exploit and protect the groundwater resources. This requires people to find out the temporal and spatial variation of groundwater and the mode of water circulation. This paper selects the Jinfo Mountain area of Nanchuan District, Chongqing. On the basis of regional natural geography and hydrogeological conditions, combined with hydrogeochemical and environmental stable isotopes, the change law of hydrochemical characteristics and the spatial distribution of hydrogen and oxygen isotopes in the Jinfo Mountain area are systematically analyzed, and the recharge form of groundwater and surface water in this area is further explored. The main results are as follows: (1) the hydrogeochemical composition of the water body in the region shows that the hydrochemical type is HCO3-Ca and Ca (Mg) -HC03, which embodies the characteristics of the wide distribution of carbonate rocks in the area. The Hydrochemical Composition of the surface water and the groundwater in the Jinfo Mountain area is distributed near the end of the rock weathering control, indicating the water body of the Jinfo Mountain. The effect of rock weathering is more obvious, which shows the consistency with the composition of the ions and yang ions in the water body. The pH value in the inland water is weak alkaline, the ratio of the total hardness to the total alkalinity outside the Jinfo Mountain natural reserve is higher than that in the protection area, indicating that the dissolution process of the soluble rock in the area is affected by other acids, and the individual sampling points are subject to people. Compared with the 70s, the ratio of the total hardness and total alkalinity of the groundwater in the Jinfo Mountain area protected area increased. The increase of.Ca2+ and Mg2+ content outside the protected area was obviously controlled by the geological background of the excretory point, and the groundwater excretion point in the limestone stratum was obviously higher in Ca2+. The Mg2+ content of groundwater excretion point in the background of dolomite is obviously higher than that in other areas. It can be seen that the factors affecting the ion concentration in the underground water and Yang of Jinfo Mountain are mainly geological background, followed by the influence of human activity. The anion concentration of groundwater HCO3-, Cl-, N03- and SO42- in the Jinfo Mountain area has been changed to different degrees in different degrees than in the 70s of the last century. The main influencing factor is human activity. (2) the hydrogen and oxygen isotopes of the water and groundwater in the ground water and groundwater in the Jinfo Mountain area are distributed along the Chongqing city's atmospheric precipitation line and the global atmospheric precipitation line, and are affected by isotopic dynamic fractionation, and there are different degrees of deviation, but the location of the groundwater is more concentrated and the river water is more concentrated. The main source of surface water and groundwater recharge in Jinfo Mountain area is atmospheric precipitation and ice snow melting water. Through the analysis of the D value of the groundwater (deuterium excess) in the area, it is found that the groundwater is smaller than the D value in the high altitude area of the mountain area, and the groundwater is supplementing with ice and snow melting water. Under the influence of filtration, cation exchange and isotope height effect, the change of groundwater change shows that the conductivity of the groundwater is gradually rising along the direction of runoff while the oxygen isotope is gradually heavier. The main reason is that the conductivity (EC) is higher than the surface water in general. The main reason is that the filtration and cation exchange of the ground water to the surrounding rock and the surface water phase are more easy to be carried out in the process of circulation. (3) the concept model of water circulation in Jinfo Mountain area is established through hydrochemistry and hydrogen oxygen isotope data analysis: in Jinfo Mountain 1267m In the high altitude area of 2133m, the atmospheric precipitation enters the circulation system of the Jinfo Mountain water in the form of rainfall and snowfall. Precipitation is influenced by the evaporation effect during the process of subsurface groundwater recharge, which causes the groundwater to accumulate heavy isotopes gradually. During the process of groundwater migration, some underground water passes through the shallow circulation and forms cold springs to the surface and part of the ground. The water continues to infiltrate and permeates through the geothermal gradient. As the temperature rises, the average velocity of water molecules is accelerated. Isotopic fractionation in the water body appears in the water. Finally, the isotopic composition of the underground hot water is formed in the deep part, and the underground hot water then rises with other cold water and forms the hot spring. The water is exposed in a relatively long distance from the mountain area through the long span migration process, showing a larger isotopic composition difference with the groundwater recharged by the local precipitation.
【學(xué)位授予單位】：西南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P641.3;P342
本文編號：2122297
[Abstract]:Water is a valuable resource for human survival, and groundwater is an important part of water resources. In the available water resources, ground water, which accounts for 98.5%. in various karst spaces, is karst water, and the karst area accounts for 15% of the global land area. At least 1 billion people live in the karst area or take the karst water as a part of the world. The main water supply source. With the increase of human activities, the pollution of karst water and the waste of water resources are becoming more and more important. It is becoming more and more important to rationally exploit and protect the groundwater resources. This requires people to find out the temporal and spatial variation of groundwater and the mode of water circulation. This paper selects the Jinfo Mountain area of Nanchuan District, Chongqing. On the basis of regional natural geography and hydrogeological conditions, combined with hydrogeochemical and environmental stable isotopes, the change law of hydrochemical characteristics and the spatial distribution of hydrogen and oxygen isotopes in the Jinfo Mountain area are systematically analyzed, and the recharge form of groundwater and surface water in this area is further explored. The main results are as follows: (1) the hydrogeochemical composition of the water body in the region shows that the hydrochemical type is HCO3-Ca and Ca (Mg) -HC03, which embodies the characteristics of the wide distribution of carbonate rocks in the area. The Hydrochemical Composition of the surface water and the groundwater in the Jinfo Mountain area is distributed near the end of the rock weathering control, indicating the water body of the Jinfo Mountain. The effect of rock weathering is more obvious, which shows the consistency with the composition of the ions and yang ions in the water body. The pH value in the inland water is weak alkaline, the ratio of the total hardness to the total alkalinity outside the Jinfo Mountain natural reserve is higher than that in the protection area, indicating that the dissolution process of the soluble rock in the area is affected by other acids, and the individual sampling points are subject to people. Compared with the 70s, the ratio of the total hardness and total alkalinity of the groundwater in the Jinfo Mountain area protected area increased. The increase of.Ca2+ and Mg2+ content outside the protected area was obviously controlled by the geological background of the excretory point, and the groundwater excretion point in the limestone stratum was obviously higher in Ca2+. The Mg2+ content of groundwater excretion point in the background of dolomite is obviously higher than that in other areas. It can be seen that the factors affecting the ion concentration in the underground water and Yang of Jinfo Mountain are mainly geological background, followed by the influence of human activity. The anion concentration of groundwater HCO3-, Cl-, N03- and SO42- in the Jinfo Mountain area has been changed to different degrees in different degrees than in the 70s of the last century. The main influencing factor is human activity. (2) the hydrogen and oxygen isotopes of the water and groundwater in the ground water and groundwater in the Jinfo Mountain area are distributed along the Chongqing city's atmospheric precipitation line and the global atmospheric precipitation line, and are affected by isotopic dynamic fractionation, and there are different degrees of deviation, but the location of the groundwater is more concentrated and the river water is more concentrated. The main source of surface water and groundwater recharge in Jinfo Mountain area is atmospheric precipitation and ice snow melting water. Through the analysis of the D value of the groundwater (deuterium excess) in the area, it is found that the groundwater is smaller than the D value in the high altitude area of the mountain area, and the groundwater is supplementing with ice and snow melting water. Under the influence of filtration, cation exchange and isotope height effect, the change of groundwater change shows that the conductivity of the groundwater is gradually rising along the direction of runoff while the oxygen isotope is gradually heavier. The main reason is that the conductivity (EC) is higher than the surface water in general. The main reason is that the filtration and cation exchange of the ground water to the surrounding rock and the surface water phase are more easy to be carried out in the process of circulation. (3) the concept model of water circulation in Jinfo Mountain area is established through hydrochemistry and hydrogen oxygen isotope data analysis: in Jinfo Mountain 1267m In the high altitude area of 2133m, the atmospheric precipitation enters the circulation system of the Jinfo Mountain water in the form of rainfall and snowfall. Precipitation is influenced by the evaporation effect during the process of subsurface groundwater recharge, which causes the groundwater to accumulate heavy isotopes gradually. During the process of groundwater migration, some underground water passes through the shallow circulation and forms cold springs to the surface and part of the ground. The water continues to infiltrate and permeates through the geothermal gradient. As the temperature rises, the average velocity of water molecules is accelerated. Isotopic fractionation in the water body appears in the water. Finally, the isotopic composition of the underground hot water is formed in the deep part, and the underground hot water then rises with other cold water and forms the hot spring. The water is exposed in a relatively long distance from the mountain area through the long span migration process, showing a larger isotopic composition difference with the groundwater recharged by the local precipitation.
【學(xué)位授予單位】：西南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P641.3;P342
【參考文獻】
相關(guān)期刊論文 前10條
1 田立德,姚檀棟,孫維貞,NUMAGUTI Atusi;青藏高原中部水蒸發(fā)過程中的氧穩(wěn)定同位素變化[J];冰川凍土;2000年02期
2 高彥芳;李紅春;沈立成;楊平恒;;重慶金佛山泉水地球化學(xué)特征及其空間分布意義[J];中國地質(zhì);2008年02期
3 劉忠方;田立德;姚檀棟;鞏同梁;尹常亮;余武生;;雅魯藏布江流域降水中δ~(18)O的時空變化[J];地理學(xué)報;2007年05期
4 柳鑒容;宋獻方;袁國富;孫曉敏;劉鑫;陳鋒;王志民;王仕琴;;西北地區(qū)大氣降水δ~(18)O的特征及水汽來源[J];地理學(xué)報;2008年01期
5 馬金珠;黃天明;丁貞玉;W. M. Edmunds;;同位素指示的巴丹吉林沙漠南緣地下水補給來源[J];地球科學(xué)進展;2007年09期
6 毛景文,李延河,李紅艷,王登紅,宋鶴彬;湖南萬古金礦床地幔流體成礦的氦同位素證據(jù)[J];地質(zhì)論評;1997年06期
7 劉焱光;付云霞;吳世迎;;即墨溫泉地熱水的氫氧同位素特征及其地質(zhì)意義[J];海岸工程;2009年02期
8 陳靜生,關(guān)文榮,夏星輝,何大偉;長江中、上游水質(zhì)變化趨勢與環(huán)境酸化關(guān)系初探[J];環(huán)境科學(xué)學(xué)報;1998年03期
9 宋獻方;劉相超;夏軍;于靜潔;唐常源;;基于環(huán)境同位素技術(shù)的懷沙河流域地表水和地下水轉(zhuǎn)化關(guān)系研究[J];中國科學(xué)(D輯:地球科學(xué));2007年01期
10 王永吉,呂厚遠,王國安,楊輝,李珍;C3,C4植物和現(xiàn)代土壤中硅酸體碳同位素分析[J];科學(xué)通報;2000年09期
相關(guān)碩士學(xué)位論文 前6條
1 饒懿;巖溶地區(qū)不同土地利用方式對地下水質(zhì)的影響[D];西南師范大學(xué);2005年
2 高彥芳;金佛山地區(qū)地下水δ~（15）N及微（常）量元素研究[D];西南大學(xué);2008年
3 吳月霞;基于SWMM的巖溶泉域水文過程的模擬研究[D];西南大學(xué);2008年
4 王冬銀;典型巖溶山區(qū)土地利用方式對巖溶作用的影響[D];西南大學(xué);2008年
5 魏靜文;華北平原地下水與地表水的水文地球化學(xué)及氫氧同位素特征分析[D];中國地質(zhì)大學(xué)(北京);2012年
6 羅健;典型表層巖溶泉域水化學(xué)特征環(huán)境敏感性及其碳匯效應(yīng)[D];西南大學(xué);2013年
，本文編號：2122297
本文鏈接：http://sikaile.net/kejilunwen/diqiudizhi/2122297.html
最近更新
教材專著
