中文摘要：

甲烷是一种重要的温室气体，虽然目前大气中含量远小于二氧化碳，但排放增长率却大于后者。研究区域为上海市黄浦江支流苏州河和淀浦河，通过实验数据对比城郊春夏的甲烷排放的差异，探讨甲烷产生的机制及其与环境因子的关系，这将有助于研究河流甲烷排放对于环境变化的影响。研究结果认为河流甲烷主要来源于水中沉积物，其产生与水质、温度等因素相关；同时甲烷摩尔浓度与硝酸根离子质量体积比存在负相关性，与铵根离子质量体积比和有机碳质量分数存在正相关性。

英文摘要：

Methane is regarded as one of significant greenhouse gases .Although methane content in the air is far less than that of carbon dioxide , the growth rate of the former is more than the latter .Two tribu-taries, Suzhou River and Dingpu River , are chosen as the study area .By comparison analysis of experi-mental data , this paper discusses the mechanism of methane generation and correlation associated with some environmental factors , which can be helpful to study the impact of the methane discharge on envi-ronmental change .The results show that methane mainly comes from the sediments in the river and its generation is correlated with water quality and temperature .And methane in the river has a negative corre-lation with ammonium salt and organic carbon ,and a positive correlation with the nitrate .