CAJ | 학술논문

岩溶旅游洞穴碳酸盐岩沉积物景观容易受到污染、风化，为了探讨受污损洞穴碳酸盐沉积物的修复方法以确保岩溶旅游洞穴的可持续发展，对广西桂林七星岩 No.15支洞距洞口约150 m 长洞段的滴水物化指标、现代碳酸盐岩沉积物进行了为期4年的监测分析。结果表明：(1)该洞段的滴水主要源于抽取地下河水的水柜渗漏及降水补给，地下河水和滴水的电导率、[Ca2+]、[HCO -3]在4个水文年中的变化趋势基本相同，雨季洞穴滴水电导率、[Ca2+]、[HCO -3]等显著降低，降雨稀释效应明显；(2)现代洞穴碳酸盐岩沉积具有明显的季节性变化，雨季洞穴滴水量/速率、碳酸钙沉积速率加快，最大沉积量达0.8 g/半月，洞穴入口约150 m 长洞段快速滴水碳酸盐最大沉积量达2~4 g/半月，旱季碳酸盐沉积速率减少，最大沉积量仅为0.4 g/半月；(3)抽取岩溶地下水经由地表补给洞穴滴水可提高滴水的电导率、[Ca2+]、[HCO -3]及 CaCO 3饱和度，促使大量碳酸盐(CaCO 3)快速沉积，实现对洞穴受风化、污染景观的修复，新沉积的碳酸钙(CaCO 3)还可以将基岩裂隙和洞穴内破损、破裂的钟乳石重新“粘结”起来，利于洞穴的稳定性。
암용여유동혈탄산염암침적물경관용역수도오염、풍화，위료탐토수오손동혈탄산염침적물적수복방법이학보암용여유동혈적가지속발전，대엄서계림칠성암 No.15지동거동구약150 m 장동단적적수물화지표、현대탄산염암침적물진행료위기4년적감측분석。결과표명：(1)해동단적적수주요원우추취지하하수적수거삼루급강수보급，지하하수화적수적전도솔、[Ca2+]、[HCO -3]재4개수문년중적변화추세기본상동，우계동혈적수전도솔、[Ca2+]、[HCO -3]등현저강저，강우희석효응명현；(2)현대동혈탄산염암침적구유명현적계절성변화，우계동혈적수량/속솔、탄산개침적속솔가쾌，최대침적량체0.8 g/반월，동혈입구약150 m 장동단쾌속적수탄산염최대침적량체2~4 g/반월，한계탄산염침적속솔감소，최대침적량부위0.4 g/반월；(3)추취암용지하수경유지표보급동혈적수가제고적수적전도솔、[Ca2+]、[HCO -3]급 CaCO 3포화도，촉사대량탄산염(CaCO 3)쾌속침적，실현대동혈수풍화、오염경관적수복，신침적적탄산개(CaCO 3)환가이장기암렬극화동혈내파손、파렬적종유석중신“점결”기래，리우동혈적은정성。
The landscape of carbonate (CaCO 3 )deposits in the karst tourism caves is susceptible to pollution and weathering on carbonate sediments.To ensure the sustainable development of the karst tourism caves,it is necessary to study the methods to repair such contaminated or damaged sediments in these caves.To attain this purpose,continuous monitoring and analysis for four years were made to chemical properties of the un-derground river,cave drips,and modern carbonate sediments in the No.15 branching cave of Seven Star Ca-ve,Guilin,Guangxi Province.The results show that the change trends of conductivity,Ca2 + and HCO -3 from the underground river and cave drip water are basically the same during this period.The conductivity, Ca2 + and HCO -3 of cave drip water decreased significantly and the rainfall dilution effect is obvious during rainfall seasons.The modern carbonate (CaCO 3 )deposits in the cave have obvious seasonal variations, where cave drip water amount,drip rate and calcium carbonate deposit rate during rainy seasons accelerate. The largest amount of deposit is 0.8 g/ half month.The largest amount of calcium carbonate deposit from rapid drip water from the cave entrance to about 150 m within the cave passage is up to 2-4 g/half month. The carbonate deposit rate during dry seasons reduces with the maximum only 0.4 g half month.The re-charge of cave drip water by extracting the karst underground river can enhance the conductivity,[Ca2 + ], [HCO -3 ]and CaCO 3 saturation of cave drip water,rapidly prompting a large number of carbonate (CaCO 3 ) deposits,and realizing restoration of the cave landscape damaged.Besides,new calcium carbonate deposit can also rebind bedrock fissures and damaged/broken speleothem and cave stalactites,which is favorable for the stability of the cave.