1LEACHING EXPERIMENT ON RESIDUAL WEATHERING CRUST OF CARBONATE ROCK--A Case Study of Pingba and Zunyi Profiles of Guizhou167-173
4SECONDARY POLLUTION OF CHROMIUM IN POWDERY COAL ASH: AN EXAMPLE OF CR6+IN UNDERGROUND WATER AROUND AN ASH SITE IN A POWER-STATION189-195
5CHARACTERISTICS OF A KARST WATER SYSTEM ON CORROSIONAL PLATEAU AND EFFICIENT EXPLOITATION OF WATER RESOURCES -- A typical case in the Xisa-Banggu karst area of Xichou county, Yunnan province196-204
6KARST HYDROGEOLOGICAL ENVIRONMENT PROBLEMS ALONG THE MAIN CANAL OF THE YELLOW RIVER DIVERSION PROJECT IN WANJIAZHAI, SHANXI205-210
7CHARACTERISTICS, FORMATION,AND CONTROLOF ROCKY DESERTIFICATIONIN LIUPANSHUI CITY, GUIZHOU PROVINCE211-216