织金大龙井岩溶大泉形成机理研究

为了弄清大龙井岩溶大泉形成机理以及地下水补径排关系。通过调查大龙井地形地貌、补径排关系以及对水化学分析等研究大龙井岩溶大泉的形成机理，通过调查得知:大龙井岩溶大泉是形成于低山－丘陵地区的石灰岩地区。是山盆期和乌江期的强烈岩溶作用以及河谷的不断下切，加上上寨台地地表峰丛之间发育洼地、漏斗，中间区域的落水洞，大气降雨沿着落水洞进入地下，在重力作用下从南向北径流，在这过程中水流逐渐集中，岩溶空间形态也逐步扩大，最终水汇集于龙洞沟呈泉集中排泄出地面，形成大龙井岩溶大泉以及大龙井水系统。 

Formation mechanism of the karst spring in Dalongjing, Zhijin, Guizhou Province

The Dalongjing karst spring system lies in Chadian township, Zhijin, Guizhou Province. This work attempts to clarify its formation mechanism and the relevant relationship between groundwater recharge and drainage by investigations to the terrain, landform, and chemical analysis. Results show that this big karst spring system formed in a limestone area with low mountains and hills. It is formed during the Range-basin and the Wujiang periods when the area have experienced a persistent river incision and strong karstifiction. As a result, karst depressions and funnels extensively developed between surface peak clusters on the Shangzhai platform and the water holes in the middle area. In addition, atmospheric rainwater enters the underground along the sinkhole, producing southward runoffs at a natural gradient. During this process, the water flow is gradually concentrated in the karst cave voids, and in turn the karst space is gradually expanded by means of physical and chemical erosions. Finally, the water is collected in the Longdonggou and discharges to the ground surface in a concentrating manner, resulting in the Dalongjing karst springs and the Dalongjing water system