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不同喀斯特岩性区森林生态系统水源涵养功能分析 预览

Water conservation function of forest ecosystem in different karst lithologic areas
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摘要 喀斯特地貌受其自然条件的约束与影响,会形成特殊的生态系统以及较为脆弱的生态环境。而生态系统水源涵养功能则能有效地调节区域水分循环,控制河流源头水土流失,改善和净化水质并拦蓄降水,是喀斯特地区生态恢复与治理的重要功能之一。本文以降水、岩性及土地利用等数据为数据源,选取西南喀斯特地区为研究区,采用降水贮存量法,分析研究区不同喀斯特岩性区生态系统水源涵养功能,得出以下结论:1)2015年西南喀斯特地区水源涵养总量为1.18×1017m^3;2)水源涵养量的最大值出现在云南省孟连傣族拉祜族佤族自治县,最小值出现在贵州省毕节市;3)西南喀斯特地区以灰岩组合类岩性区为主,其中连续性灰岩岩性区分布最广;4)水源涵养功能随碳酸盐岩含量的增高而减少,以灰岩为主的岩性区的水源涵养功能比以白云岩为主的岩性区的水源涵养功能差。 The karst landform is restricted and influenced by its natural conditions,and will form special ecosystems and relatively fragile ecological environment.Water conservation function of the ecosystem can effectively regulate the water cycle,control soil erosion,improve water quality and intercept precipitation,thus being one of the most important functions of ecological restoration and management in karst areas.In this paper,we took precipitation,lithology and land use data as data sources,selected the karst areas in Southwest China as the target area,and used the precipitation storage method to analyze the water conservation function of the ecosystem in different karst lithologic areas.We reached the following conclusions:1)the total water conservation in the karst areas of Southwest China was 1.18×10 17 m^3 in 2015;2)the maximum water conservation quantity appeared in Menglian County,Yunnan Province,and the minimum value appeared in Bijie City,Guizhou Province;3)the karst areas of Southwest China was mainly composed of limestone assemblage,among which the continuous limestone area was the most widely distributed;4)the water conservation function decreased with the increase of carbonate rock content,and the water conservation function of the limestone-dominated areas was worse than that of the dolomite-dominated areas.
作者 罗毓融 胡稳 杨青 LUO Yurong;HU Wen;YANG Qing(School of Geography and Environmental Science,Guizhou Normal University,Guiyang 550025,China)
出处 《贵州科学》 2019年第1期54-59,共6页 Guizhou Science
关键词 喀斯特 生态环境 水源涵养 岩性 karst ecological environment water conservation lithology
作者简介 罗毓融(1994-),女,贵州省贵阳人,硕士在读,研究方向:地图学与地理信息系统。
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