求翻译：在天桥泉、延河泉、城头会泉等潜力较大的泉域，增加岩溶地下水供水能力3亿m3，其中1.5亿m3留做应急备用。发挥岩溶泉域面积大，调蓄能力强的特点，提高供水保证程度。是什么意思？

Potential flyover spring, Yanhe, city of the first spring spring area, the increase in karst groundwater in water supply capacity of 300 million m3, of which 150 million cubic meters set aside for emergency backup. Play a karst spring catchment area, strong regulation and storage capacity, improve t

On the flyover Junichiro Koizumi Junichiro Koizumi, Yan River, city, such as the Prime Minister Koizumi Junichiro Koizumi's domain, there is considerable potential for increasing karst groundwater water capacity, 300 million m3 of which 150 million m3stay do contingency reserve. Play a karstic Sprin

In the over-bridge spring, the Yan River spring, the top of a city wall meet the spring and so on the potential big spring territories, increase karst ground water water furnishing ability 300,000,000 m3, 150,000,000 m3 remains does emergency spare.The display karst spring territory area is big, sto

In Tianqiao spring, yanhe spring, chengtou springs and other potential larger spring field, karst groundwater in increasing water supply capacity of 300 million m3, of which 150 million m3 can take emergency standby. Play a large Karst spring field area, storage capacity of characteristics, improvin