广西弄拉兰电堂岩溶泉水化学动态变化

Hydro-chemical variation explanation to Landiantang spring in Nongla of Guangxi

利用多参数自动记录仪对广西弄拉兰电堂泉无降雨时的水化学动态变化监测表明,水中CO2分压、温度和包气带含水状况是驱动泉水水化学动态变化的主要因素。气温变化、降雨及太阳辐射的昼夜更替,影响了植物生命活动的强弱。湿季泉水的溶蚀强度明显大于干季,表现为方解石饱和指数(SIC)和白云石饱和指数(SID)较高。干湿季无降雨气候条件下,温度对植物活动起主要控制作用。

Through the research on Landiantang spring in Guangxi, the authors monitored and analyzed hydrochemical variations during non-rainfall term, and suggested that the carbon dioxide partial pressure in spring water, temperature and aquifer condition play the key roles in controlling daily geochemical variation of epi-karst spring water. Moreover, insolation strength, rainfall amount and solar radiation affected the vegetation activity. More erosion effectiveness occurred in wet months presented by the high value of SIC and SID than in dry season. The temperature controlled the vegetation productivity both in dry and wet seasons without precipitation.