论文部分内容阅读
About 25%of the world’s population obtains water from karst aquifers.But when rainfall falls on the karst system,where does the water go?What fl ow path does the water take?What is the percentage of water that can be used by humans?And
About 25% of the world’s population obtains water from karst aquifers.But when rainfall falls on the karst system, where does the water go? What fl ow path does the water take? What is the percentage of water that can be used by humans? And