不同等级石漠化地区洞穴滴水的物理化学特征对比研究

对贵州不同等级石漠化地区6个洞穴7月份的滴水物理指标(滴水滴率、电导率)和化学指标(p H值、Ca2+)进行了监测,并探讨了各指标的变化规律及环境意义,得出以下结论:1受地表植被影响,潜在石漠化地区洞穴滴水滴率较强度石漠化地区小,随着洞穴长度的加深,不同等级石漠化地区滴水滴率均趋于稳定;2各滴水点p H值并未表现出降雨的稀释效应,潜在石漠化地区不同洞穴的滴水p H值情况表现不一致,强度石漠化地区p H值普遍偏高;3潜在石漠化地区较强度石漠化地区滴水电导率偏大,不同等级石漠化地区洞穴滴水的电导率值正比于滴水Ca2+含量。

Physical and Chemical Characteristics of Cave Drips in Different Rocky Desertification Area

Physical indexes (drip rate, EC) and chemical indicators (pH, Ca₂₊) of karst cave drips were analyzed from different grades of rocky desertification area in Guizhou in July, and the change law of each index and their environmental significance were probed, the conclusions are as followed: (1) Affected by the ground-surface vegetation, the drip rate of potential rocky desertification area is smaller than that of severe rocky desertification area, drip rates from different grades rocky desertification areas tend to be stable when go deep into cave passage. (2) pH of each drop did not show the dilution effect of rainfall, drip pH value in each cave performed differently in potential rocky desertification area, and pH value in severe rocky desertification area is generally high. (3) the EC value of drips in potential rocky desertification area is larger than that of severe rocky desertification area, and the EC in different grades rocky desertification area is directly proportional to Ca₂ content.