1Dissolved inorganic carbon and stable carbon isotope in karst subterranean streams in Chongqing, ChinaPU Jun-bing123-1322Influence of agricultural activity on hydro-chemical characteristics and dissolved inorganic carbon leakage in epi-karst springsZHANG Xiao-wei, XU Shang-quan, ZHOU Xiao-ping133-1393Study on the recharge to the Niangziguan Springs by extreme precipitationFU Xiao-ming, HAO Yong-hong, FAN Yong-hui, LI Chao, LIU Yan, WANG Tong-ke, WANG Zhi-bo140-1474Flow field inversion of karst underground river and estimation of hydrogeological parameters based on online tracer techniqueCHEN Xue-bin, ZHOU Jun, LAN Jia-cheng, XIAO Jing-ge, YANG Ping-heng148-1525First and second level karst environment zoning for highway engineeringDAI Jian-ling, LEI Ming-tang153-160,1746Karst features and optimization of karst foundation treatment in Luodi-Xinhua ExpresswayXIAO Wu-quan161-1667Research on the reason for geologic disaster by karst surface collapse at Jinshazhou in GuangzhouHUANG Jian-min, Lü Mei-na, GUO Yu, CHEN Xiao-yue167-1748Distribution features and forming conditions of the Mashankou karst collapse in Huaining County, Anqing CityPAN Guo-lin, FANG Tao, CAI Sheng-lai, HONG Tian-qiu175-1819The existing conditions of PAHs in multimedium in typical karst area:A case in the Leye Tiankeng Group, GuangxiKONG Xiang-sheng, QI Shi-hua182-18810Preliminary study on OCPs in water body of the Laolongdong underground river basin in ChongqingXU Xin, SUN Yu-chuan, Md.Jahangir Alam189-19411On the history of tectonic evolution and karstification in WuhanLUO Xiao-jie195-20212Research progress on the interannual-interdecadal extreme weather event recorded by stalagmitesYIN Jian-jun, QIN Jia-ming, LIN Yu-shi203-21013Assessment on the eco-service value in karst rocky desert:A case study in Jinsha CountyGUO Hong-yan, WANG Yue-rong, LU qi, ZHOU Jin-xing, WEI Qing-zhang211-217,22414The impact of tourist activity on species diversity in different vegetable layers in the Dragon Palace scenic spotLI Long, YIN Hong-mei218-22415The logging recognition for the infill and the filling degree in karst caveZHAO Jun, LI Zong-jie, YU Bing, LIU Jian-hua225-230,23716RS classification information extraction of landuse in karst area by means of object oriented approach: A case in Bijie, GuizhouLI Xue-dong, YANG Guang-bin, LI Man, FAN Wen-juan, CHEN Tao231-23717Study on karst cave tour guide commentary based on content analysisYANG Xiao-xia, SHI Ding-fang, XIANG Xu239-245 