猫跳河流域梯级开发水库夏季甲烷排放研究  

Study on Methane Emission of Cascade Reservoirs on Maotiaohe River Basin in summer

作　　者：杨妍[1] 刘丛强[2] 吴攀[1] 刘小龙[2] 

机构地区：[1]贵州大学资源与环境工程学院,贵州贵阳550003 [2]中国科学院地球化学研究所环境地球化学国家重点实验室,贵州贵阳550002

出　　处：《贵州水力发电》2009年第3期12-16,共5页Guizhou Water Power

基　　金：国家自然科学基金重点项目(90610037);中国科学院知识创新工程重要方向项目(kzcx2-yw-137)

摘　　要：夏季对猫跳河流域梯级开发的各水库在坝前采集分层水样并进行分析,结果表明水的温度和溶解氧都会影响甲烷的产生和分布;其中红枫水库和百花水库存在2个温度不连续层,在连续层以下以厌氧环境为主,产生大量的甲烷气体;修文水库以及红岩水库在整个剖面上只产生少量的甲烷气体。水库甲烷的产生与世界上水库湖泊内甲烷的产生相似,水库以底层泄水的方式排放到大坝下游对于温室气体释放来说影响重大,而水库则有可能改变了原来河流的甲烷含量的分配,说明梯级水库的建设使用对甲烷的排放影响很大,这在水电开发的环境保护中应当引起重视。According to analyzing the stratified water sample acquired from the front of dam in each reservoir of Maotiaohe river basin, the result indicated that both of the water temperature and dissolved oxygen would have influence Occurring and distribution of methane. There were 2 temperature discontinuity layers both in Hongfeng and Baihua reservoir, but there would occur the mass methane under the continuity layer that put the anaerobic environ- ment first. A little methane would occur on whole section both in Xiuwen and Hongyan reservoir. The reservoirs were similar in methane occurring to the lakes in the world. Discharging to the downstream by bottom water release would greatly influence the greenhouse gas emission. The reservoirs probably changed the distribution of methane content of the river. It showed that building cascade reservoirs would greatly influence the methane emission. This would be pay attention to in＇environmental protection of hydropower development.

关 键 词：环境工程学 甲烷 溶解氧 泄水方式 梯级水库 

分 类 号：X143[环境科学与工程—环境科学]