CAJ | 학술논문

根据现场取样分析，对江苏泗阳城区浅层地下水水文地质特征、水化学组分在空间上的分布特征进行了研究，并对其形成特点和影响因素进行探讨。结果表明：研究区浅层地下水水化学类型呈现明显的平面分带性，京杭运河西南侧浅层地下水阴离子中 HCO －3占主导地位，溶解性总固体（TDS）多小于1 g／L，总硬度小于450 mg／L，水质一般较好；京杭运河东北侧浅层地下水阴离子以 HCO －3、Cl －、SO2－4为主，TDS 多介于1～3 g／L，总硬度大于450 mg／L，为微咸水，水质变差。研究区 NH ＋4-N、NO －3-N 污染较明显，空间分布具有明显的地域性差异；高浓度分布在京杭运河两岸以及泗阳农场一带，纵向上 NH ＋4-N 高浓度主要集中在小于18 m 的浅层地下水，NO －3-N 多在8～20 m 的浅层地下水富集。研究区浅层地下水水化学组分现状特征及其差异性的形成与演化，受海陆交互相沉积环境、含水介质、地下水补径条件以及人类活动等因素的影响。
근거현장취양분석，대강소사양성구천층지하수수문지질특정、수화학조분재공간상적분포특정진행료연구，병대기형성특점화영향인소진행탐토。결과표명：연구구천층지하수수화학류형정현명현적평면분대성，경항운하서남측천층지하수음리자중 HCO －3점주도지위，용해성총고체（TDS）다소우1 g／L，총경도소우450 mg／L，수질일반교호；경항운하동북측천층지하수음리자이 HCO －3、Cl －、SO2－4위주，TDS 다개우1～3 g／L，총경도대우450 mg／L，위미함수，수질변차。연구구 NH ＋4-N、NO －3-N 오염교명현，공간분포구유명현적지역성차이；고농도분포재경항운하량안이급사양농장일대，종향상 NH ＋4-N 고농도주요집중재소우18 m 적천층지하수，NO －3-N 다재8～20 m 적천층지하수부집。연구구천층지하수수화학조분현상특정급기차이성적형성여연화，수해륙교호상침적배경、함수개질、지하수보경조건이급인류활동등인소적영향。
Based on experimental data of the shallow groundwater samples,the hydrogeological characteristics in Siyang area and spatial distributions of the chemical components were studied,meanwhile,the formation char-acteristics and influencing factors were discussed.The results showed that the hydrochemical type of shallow groundwater in Siyang area presented some horizontal zoning regularity.In the southwest of the Grand Canal, HCO -3 is the predominant anion of the shallow groundwater;total dissolved solids (TDS)is less than 1 g/L;to-tal hardness is less than 450 mg/L,and the water quality is generally good.While in the northeast of the Grand Canal,the predominant anions of shallow groundwater are HCO -3 ,Cl - and SO2 -4 ;TDS usually is within 1 -3 g/L;total hardness is more than 450 mg/L;the water is brackish and the quality is bad.In addition,the am-monium nitrogen and nitrate nitrogen contaminations of the shallow groundwater are obvious in Siyang area,and the spatial distributions there have significantly uneven regional differences,ammonium nitrogen and nitrate ni-trogen concentrations are high at both sides of the Grand Canal and near the Siyang farm.NH +4 -N high-concen-tration in shallow groundwater is less than that in 18 meters in the vertical,while NO -3 -N high-concentration in shallow groundwater is within 8 -20 meters.The spatial variations of hydrochemical characteristics of shallow ground-water in Siyang area are affected by the interactive marine and terrestrial deposit,the chemical constitu-ents of the supply source,supply and runoff flow conditions of aquifer medium and human activities.