CAJ | 학술논문

北部湾经济区的飞速发展，引发了一系列环境地质问题。为查明经济区内的主要环境地质问题类型、分布特征、背景条件以及成因等，本次通过遥感解译、地面调查以及水化学分析等技术手段进行1︰25万环境地质调查，在此基础上综合集成，对北部湾经济区的主要环境地质问题进行了梳理。目前需要引起关注的重大环境地质问题为断裂活动性与区域地壳稳定性、地下水污染、特殊土环境工程地质问题、地质灾害以及海岸带相关环境地质问题。经济区内的主要环境地质问题分布较分散，发育的程度也有差异。北部湾经济区内地震多沿断裂成条带状展布，主要发生在NE向和NW向断裂的交汇处，地下水污染呈点状分布，主要污染组分为氨氮和硝酸盐等，工程地质问题主要为南宁地区的膨胀土、沿海软土以及填海造陆地区的场地稳定性问题，地质灾害主要以经济区中东部的灵山、浦北及横县一带较为集中，沿海一带的海岸侵蚀和淤积、海水入侵和高位养殖引发的地下水污染和地下水咸化等环境地质问题较为突出。
북부만경제구적비속발전，인발료일계렬배경지질문제。위사명경제구내적주요배경지질문제류형、분포특정、배경조건이급성인등，본차통과요감해역、지면조사이급수화학분석등기술수단진행1︰25만배경지질조사，재차기출상종합집성，대북부만경제구적주요배경지질문제진행료소리。목전수요인기관주적중대배경지질문제위단렬활동성여구역지각은정성、지하수오염、특수토배경공정지질문제、지질재해이급해안대상관배경지질문제。경제구내적주요배경지질문제분포교분산，발육적정도야유차이。북부만경제구내지진다연단렬성조대상전포，주요발생재NE향화NW향단렬적교회처，지하수오염정점상분포，주요오염조분위안담화초산염등，공정지질문제주요위남저지구적팽창토、연해연토이급전해조륙지구적장지은정성문제，지질재해주요이경제구중동부적령산、포북급횡현일대교위집중，연해일대적해안침식화어적、해수입침화고위양식인발적지하수오염화지하수함화등배경지질문제교위돌출。
A series of environmental geological problems were caused by the rapid development of economic con-struction in Beibu Gulf Economic Zone. This study will summarize and analyze the types, distribution characteris-tics, background conditions and cause of the main geological environmental problems in Beibu Gulf Economic Zone based on remote sensing analysis, environmental geological investigation and water chemical analyses. The five major important geological environmental problems need to focus in Beibu Gulf Economic Zone are fracture activity and regional crustal stability, groundwater pollution, environmental engineering geological problems of special soil, geologic hazards and coastal geological environment problems. The main geological environmental problems with different characteristics are widely scattered. Earthquakes distributed along the fault, especially in the intersection of the NE and NW faults. Groundwater with high ammonia and nitrate content exceeding the standard was spotted. The main engineering geological problems were stability of expansive soil in Nanning area, soft soil in coastal and marine reclamation. Geological disasters were relatively developed in mid-eastern in Ling-shan, Pubei and Hengxian. Coastal erosion and deposition, seawater intrusion, groundwater pollution and salin-ization caused by mariculture were relatively prominent in coastal area.