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通过野外定位监测和室内测试分析,研究了典型喀斯特峰丛洼地小流域2013年6月—2014年3月期间溪流不同时间尺度(昼夜、次降雨、季节)主要水文水化学指标的动态变化特征及其影响因素.结果表明:日尺度无雨条件下,溪流水化学过程表现出明显的波动规律,植物光合作用和呼吸作用在昼夜间的相互转换是导致这种变化的主要原因;次降雨尺度下,溪流水文水化学过程的日尺度效应被掩盖,水文水化学过程主要受控于前期无雨天数和降雨强度;从季节尺度看,溪流对降雨表现出较快的响应,雨季响应快于旱季,降雨季节分配差异和温度是影响溪流水文水化学变化的主要因素.
Through the field monitoring and indoor test analysis, the dynamic characteristics of the main hydrological and hydrological indexes at different timescales (diurnal, sub-rains and seasons) in a typical karst peak-cluster depressions watershed from June 2013 to March 2014 were studied. The results show that under the rain-no-rainconditions, the stream water chemical process shows obvious fluctuation, and the photosynthesis and respiration of plants are the main reasons leading to this change. On the seasonal scale, the stream shows a quick response to rainfall, the rainy season response is faster than the dry season, The differences in seasonal distribution of rainfall and temperature are the main factors affecting the hydrological and chemical changes of streams.