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山地灾害和人类活动干扰下九寨沟下季节海的沉积变化()

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《山地学报》[ISSN:1008-2186/CN:51-1516]

Title:: Environmental Change Revealed by Lake Sedimentation in Jiuzhaigou National Reserve, Sichuan, China

作者:: 陈盼;唐亚;乔雪;肖维阳;蹇代军;; 1.四川大学环境科学与工程系，四川成都 610065；
2.九寨沟国家自然保护区科研处，四川九寨沟 623400

Author(s):: CHEN Pan; TANG Ya; QIAO Xue; XIAO Weiyang; JIAN Daijun; 1. Department of Environmental Science and Engineering, Sichuan University, Chengdu 610065, China;
2. Scientific Research Department, Jiuzhaigou Administrative Bureau, Jiuzhaigou 623400,China

Keywords:: Tourism; geological hazards; lake sediment; human activity; forest logging

摘要:: 九寨沟是我国旅游强度最大的山地旅游地之一,山地灾害是其旅游发展过程中面临的主要挑战。为了探讨山地灾害和人类活动对湖泊生态系统的影响,以下季节海湖泊沉积物为研究对象,利用137Cs和210Pb建立年代标尺,对沉积物粒度进行了分析1。37Cs和210Pb定年法确定湖底下38.5 cm处为1952年的沉积物,50 cm处为1848年的;沉积物粒度分析结果显示,剖面内中值粒径平均值偏大,沉积速率和粗颗粒含量在1952年之后呈明显增大趋势。结果表明,沉积物来源主要是泥石流等山地灾害造成的泥砂入湖、旅游开发过程中道路等基础设施建设带来的颗粒物质;湖泊沉积对流域内的山地灾害,如泥石流等有较好的响应;森林采伐...

Abstract:: Jiuzhaigou is one of the most popular mountain tourist destinations in China. Fast increasing visitors, geological and mountain hazards and human activities like logging and construction of roads are recognized as the main challenges in sustainable tourism development. Grain size of sediments of the lower Seasonal Lake in Jiuzhaigou was studied in order to understand the responses of sedimentation to geological events, mountain hazards and human activities like earthquake, logging and road construction. 137Cs and 210Pb dating identified the 38.5 cm of the profile to be the year 1952, and 50 cm 1848. Grain size analysis revealed that the average value of the profile was somewhat coarse and that the deposition rate and percentage of sand after 1952 were considerably increased. Occurrence of geological events in the region such as earthquakes and local mountain hazards like landslides and debris flows were well represented in the sediments. Construction of infrastructure, like roads, walk boards and other service facilities, has contributed to the present composition of grains of different sizes. Logging in the late 1960s to the mid-1970s has also contributed to high percentage of coarse grains in the sediments. This study suggests that good planning and implementation of appropriate measures are important to reduce risks of mountain hazards in tourism development in mountainous regions.

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备注/Memo:: 收稿日期(Received date)：2011-08-20。
基金项目（Foundation item）：“高等学校学科创新引智计划”（编号B08037）和四川省科技厅国际合作计划项目(2010HH0007)。\[The project is financially supported jointly by the 111 Project (No. B08037) and the International Cooperation Program of Science and Technology Department, Sichuan Province(2010HH0007).\]
作者简介（Biography）：陈盼（1989-），女，汉族，河南省南阳市人，硕士研究生，主要从事环境生态学方面的研究。\[Chen Pan (1989-), female, the Han nationality, born in Nanyang of Henan, graduate student, main research area is environmental ecology.\] E-mail：chenpan1228@gmail.com
通讯作者(Author for correspondence)：tangya@scu.edu.cn

更新日期/Last Update: 1900-01-01