CAJ | 학술논문

利用洞穴指标体系研究地表石漠化演变处于理论萌芽阶段.据此,通过对发育在强度石漠化条件下的石将军洞穴滴水滴率、pH值及温度进行为期1 a的动态监测,在分析其特征空间、时间变化规律基础的上,初步探索其石漠化效应.研究结果表明:受石漠化发育引起的地表植被破坏严重、土层稀薄影响,上覆顶板对水分的赋存主要靠基岩来完成,基岩愈厚,洞穴滴水滴率、pH 值与温度变率愈小,因此表现出越靠近洞口受外界影响越强烈、变幅越大的特征;同时,强度石漠化条件下,土壤中可利用的CO2较少,使得洞穴滴水pH 值显示了雨季时值较高、旱季时值较低的反常特征.
이용동혈지표체계연구지표석막화연변처우이론맹아계단.거차,통과대발육재강도석막화조건하적석장군동혈적수적솔、pH치급온도진행위기1 a적동태감측,재분석기특정공간、시간변화규률기출적상,초보탐색기석막화효응.연구결과표명:수석막화발육인기적지표식피파배엄중、토층희박영향,상복정판대수분적부존주요고기암래완성,기암유후,동혈적수적솔、pH 치여온도변솔유소,인차표현출월고근동구수외계영향월강렬、변폭월대적특정;동시,강도석막화조건하,토양중가이용적CO2교소,사득동혈적수pH 치현시료우계시치교고、한계시치교저적반상특정.
Research At present the research on usage of cave index system recording surface’s rocky desertification development lies at theory's rudiments phase. Based on the data of dynamic monitoring of Shi Jiangjun Cave in an intense rocky desertification area, the paper analyzes the spatial-temporal characteristics of drips’ rate, pH and temperature of the cave and makes a preliminary exploration on the effect of rocky desertification. Meanwhile, the paper also makes a contrastive analysis between drips pH characters of Shi Jiangjun Cave and those of the cave in non-rocky desertification areas and provides corresponding proof fromδ13C value of Shi Jiangjun Cave’s deposit. The main conclusions got in this article are as follows:In rocky desertification areas, vegetation on the surface is always damaged seriously and soil is rare because of erosion. Under such kind of circumstance, karst water is mainly stored in bed rock. So, the thicker the bed rock is, the more stable the variability of drips’ rate, pH value and temperature are. Correspondingly, the drips close to cave entrance are sensitive to environment with high variation. And also, the available amount of CO2 is scarce under intense rocky desertification environment, resulting in an abnormal phenomenon of higher pH value in rainy season than in dry season.