CAJ | 학술논문

西南喀斯特地区是我国生态环境最脆弱的地区之一,土壤侵蚀及其造成的石漠化已成为制约该区可持续发展最严重的生态环境问题.本文以桂西北喀斯特丘陵区环江成义屯的峰丛洼地小流域为研究对象,运用~(137)Cs示踪技术对洼地泥沙堆积与小流域土壤流失速率进行了定量研究.结果表明,1963-2007年的44年间,洼地泥沙堆积速率和堆积模数分别为0.38cm·a~(-1)和51.4t·km~(-2)·a~(-1).讨论了流域土壤地面流失与洼地泥沙堆积速率的关系,认为前者应比较接近于后者,研究小流域的土壤地面流失模数为57.1t·km~(-2)·a~(-1).研究结果表明,研究区域近几十年以来的地面水土流失轻微,土壤流失速率仅为数十t·km~(-1)·a~(-1).
서남객사특지구시아국생태배경최취약적지구지일,토양침식급기조성적석막화이성위제약해구가지속발전최엄중적생태배경문제.본문이계서북객사특구릉구배강성의둔적봉총와지소류역위연구대상,운용~(137)Cs시종기술대와지니사퇴적여소류역토양류실속솔진행료정량연구.결과표명,1963-2007년적44년간,와지니사퇴적속솔화퇴적모수분별위0.38cm·a~(-1)화51.4t·km~(-2)·a~(-1).토론료류역토양지면류실여와지니사퇴적속솔적관계,인위전자응비교접근우후자,연구소류역적토양지면류실모수위57.1t·km~(-2)·a~(-1).연구결과표명,연구구역근궤십년이래적지면수토류실경미,토양류실속솔부위수십t·km~(-1)·a~(-1).
The Karst area of Southwest China is considered as one of regions having the most fragile ecological environment in China. Soil erosion and rocky desertification have become the most severe environmental concerns in the region. However, the reliable studies about soil erosion and sediment in that region are limited and the fundamental researches lag behind the practices of governing rocky desertification for a long time. A study on sediment deposition and soil loss rates has been undertaken in a hill peak -cluster depression catchment of hilly area of Northwest Guangxi by using ~(137)Cs technique. For the period from 1963 to 2007, the average deposition rate and deposition modulus of the catchment are 0. 38cm·yr~(-1) and 51. 4t·km~(-2)·yr~(-1), respectively. The relation between the surface soil loss rate and the sediment deposition rate was also discussed. They are very close and the surface soil loss rate of the catchment is 57.1t·km~(-2)·yr~(-1). The results indicate that the surface soil loss rate was slight in the study areas.