本文主要研究内容
作者陈宝辉(2019)在《塔塔凌河河流―地下水交互带水量交换研究》一文中研究指出:河流―地下水交互带是河道内物质、能量交换最活跃的区域,也是流域生态环境变化的敏感区,受控于地形地貌、气象等多种因素,特别是在河流―地下水转化频繁的西北干旱盆地内,河流―地下水交互带内水量交换及其时空变化对流域下游生态环境质量影响显著。本文以位于柴达木盆地的塔塔凌河为研究对象,基于实测的水位与温度数据,分析了河流―地下水交互带内水量交换的时空分布特征,计算了交互带内河流与地下水交换量,探讨了交互带内水量转换的影响因素,对比了基于水动力学和温度示踪的水量交换结果的差异性,分析了两种计算方法的适用条件。主要研究成果如下:(1)塔塔凌河流域河流―地下水交互带内水动力条件受上游来水量影响明显,在非洪水期,交互带内水头差较小,在洪水期来水量增加,地下水对河流的垂向补给作用增大。基于水动力学法的水量计算结果表明,交互带内以地下水补给河水为主,自河边至河中心交换量逐渐增大,各监测点交换量平均值在-0.279m~3/m~2/d~0.082m~3/m~2/d之间,越靠近上游,交互带内地下水补给河水的速率对洪水过程响应越明显。(2)塔塔凌河流域,在非洪水期,河床表面以下不同深度温度变幅较大,洪水来临时,河床温度整体下降,河床表面以下不同深度的温度变化明显减小。在垂向上河床温度具有成层作用,根据不同深度处的温度分布可以划分三个带:骤变带(0~-20cm),渐变带(-20~-50cm),稳定带(-50cm);在水平方向上,河中心温度相对稳定,而两岸温度变化较大。基于温度的水量计算结果表明,各监测点交换量平均值在-0.27m~3/m~2/d~0.149m~3/m~2/d之间。(3)洪水过程改变了交互带内水动力场,从而影响水量交换。河床渗透系数的大小是影响交互带内水量转化的主要因素,在河床渗透系数相对较大的监测点上水量交换速率也相对较大。在整个流域尺度上,区域水动力特征对河流―地下水交互带内的水量转化有明显的控制作用,但由于河床地形的起伏导致河床内部压力的分布状况发生变化,在较小尺度的河床剖面上水流在垂向上的流向与流域尺度的河流与地下水转化方向存在一定差异。(4)在水量转化方向研究方面,水动力学方法与温度示踪方法的结果具有一致性,但在定量表述交互带水量交换方面,两种方法表现出明显的时空差异性。在精确测定河床渗透系数的条件下,水动力学方法作为传统的研究方法具有广泛的适用性。在浅部河床(50cm以浅)地形较为平坦的河中心采用温度示踪法,获得的交换水量更加稳定。
Abstract
he liu ―de xia shui jiao hu dai shi he dao nei wu zhi 、neng liang jiao huan zui huo yue de ou yu ,ye shi liu yu sheng tai huan jing bian hua de min gan ou ,shou kong yu de xing de mao 、qi xiang deng duo chong yin su ,te bie shi zai he liu ―de xia shui zhuai hua pin fan de xi bei gan han pen de nei ,he liu ―de xia shui jiao hu dai nei shui liang jiao huan ji ji shi kong bian hua dui liu yu xia you sheng tai huan jing zhi liang ying xiang xian zhe 。ben wen yi wei yu chai da mu pen de de da da ling he wei yan jiu dui xiang ,ji yu shi ce de shui wei yu wen du shu ju ,fen xi le he liu ―de xia shui jiao hu dai nei shui liang jiao huan de shi kong fen bu te zheng ,ji suan le jiao hu dai nei he liu yu de xia shui jiao huan liang ,tan tao le jiao hu dai nei shui liang zhuai huan de ying xiang yin su ,dui bi le ji yu shui dong li xue he wen du shi zong de shui liang jiao huan jie guo de cha yi xing ,fen xi le liang chong ji suan fang fa de kuo yong tiao jian 。zhu yao yan jiu cheng guo ru xia :(1)da da ling he liu yu he liu ―de xia shui jiao hu dai nei shui dong li tiao jian shou shang you lai shui liang ying xiang ming xian ,zai fei hong shui ji ,jiao hu dai nei shui tou cha jiao xiao ,zai hong shui ji lai shui liang zeng jia ,de xia shui dui he liu de chui xiang bu gei zuo yong zeng da 。ji yu shui dong li xue fa de shui liang ji suan jie guo biao ming ,jiao hu dai nei yi de xia shui bu gei he shui wei zhu ,zi he bian zhi he zhong xin jiao huan liang zhu jian zeng da ,ge jian ce dian jiao huan liang ping jun zhi zai -0.279m~3/m~2/d~0.082m~3/m~2/dzhi jian ,yue kao jin shang you ,jiao hu dai nei de xia shui bu gei he shui de su lv dui hong shui guo cheng xiang ying yue ming xian 。(2)da da ling he liu yu ,zai fei hong shui ji ,he chuang biao mian yi xia bu tong shen du wen du bian fu jiao da ,hong shui lai lin shi ,he chuang wen du zheng ti xia jiang ,he chuang biao mian yi xia bu tong shen du de wen du bian hua ming xian jian xiao 。zai chui xiang shang he chuang wen du ju you cheng ceng zuo yong ,gen ju bu tong shen du chu de wen du fen bu ke yi hua fen san ge dai :zhou bian dai (0~-20cm),jian bian dai (-20~-50cm),wen ding dai (-50cm);zai shui ping fang xiang shang ,he zhong xin wen du xiang dui wen ding ,er liang an wen du bian hua jiao da 。ji yu wen du de shui liang ji suan jie guo biao ming ,ge jian ce dian jiao huan liang ping jun zhi zai -0.27m~3/m~2/d~0.149m~3/m~2/dzhi jian 。(3)hong shui guo cheng gai bian le jiao hu dai nei shui dong li chang ,cong er ying xiang shui liang jiao huan 。he chuang shen tou ji shu de da xiao shi ying xiang jiao hu dai nei shui liang zhuai hua de zhu yao yin su ,zai he chuang shen tou ji shu xiang dui jiao da de jian ce dian shang shui liang jiao huan su lv ye xiang dui jiao da 。zai zheng ge liu yu che du shang ,ou yu shui dong li te zheng dui he liu ―de xia shui jiao hu dai nei de shui liang zhuai hua you ming xian de kong zhi zuo yong ,dan you yu he chuang de xing de qi fu dao zhi he chuang nei bu ya li de fen bu zhuang kuang fa sheng bian hua ,zai jiao xiao che du de he chuang pou mian shang shui liu zai chui xiang shang de liu xiang yu liu yu che du de he liu yu de xia shui zhuai hua fang xiang cun zai yi ding cha yi 。(4)zai shui liang zhuai hua fang xiang yan jiu fang mian ,shui dong li xue fang fa yu wen du shi zong fang fa de jie guo ju you yi zhi xing ,dan zai ding liang biao shu jiao hu dai shui liang jiao huan fang mian ,liang chong fang fa biao xian chu ming xian de shi kong cha yi xing 。zai jing que ce ding he chuang shen tou ji shu de tiao jian xia ,shui dong li xue fang fa zuo wei chuan tong de yan jiu fang fa ju you an fan de kuo yong xing 。zai jian bu he chuang (50cmyi jian )de xing jiao wei ping tan de he zhong xin cai yong wen du shi zong fa ,huo de de jiao huan shui liang geng jia wen ding 。
论文参考文献
论文详细介绍
论文作者分别是来自长安大学的陈宝辉,发表于刊物长安大学2019-11-04论文,是一篇关于河流地下水论文,交互带论文,水量交换论文,温度示踪论文,塔塔凌河论文,长安大学2019-11-04论文的文章。本文可供学术参考使用,各位学者可以免费参考阅读下载,文章观点不代表本站观点,资料来自长安大学2019-11-04论文网站,若本站收录的文献无意侵犯了您的著作版权,请联系我们删除。
标签:河流地下水论文; 交互带论文; 水量交换论文; 温度示踪论文; 塔塔凌河论文; 长安大学2019-11-04论文;