从地理角度谈河流流向的判读方法

河流与我们密切相关,高考中试题的设计往往会以某流域为载体,来考查相关的自然以及人文地理特征。其中涉及到河流流向的判读的试题就很多。那么在试题中如何判断河流流向呢？下面笔者就平时教学中积累的几点方法做一简单介绍。     

江河能“消化”生活污水吗？——记对嘉陵江段河流自净能力的研究性学习活动

在地理新课改的实践中,行为主义学习理论将地理课堂和实践操作紧密联系起来。地理作为一门实践性很强的学科,知识的获取并不能局限于课堂中的教学,我们应当跳出传统课堂的框架,结合有效的乡土资源,开设“第二课堂”,让学生通过“做中学”,获取直接经验的积累。     

一道地理试题的能力考向解读

题目 （2011年高考福建省文科综合试卷综合题第37题）下图为R河流域及周边地区图。结合材料回答下列问题。     

三工河流域农户土地流转因素与流转规模灰色关系研究

运用灰色理论方法,通过农户问卷抽样调查,对三工河流域土地流转因素与规模的关系进行了分析,得出以下结论:(1)三工河流域的土地流转因素与流转规模整体上属于中等关联度.(2)土地流转因素对流转规模的灰色影响以中等和较强水平为主.人均收入对土地流转规模的灰色影响最大,农村社会保障程度、土地流转市场的发育程度和政府对土地流转的...     

我国东部河水的化学地理特征

本文讨论我国东部河水的重要理化指标、化学稳定性、酸和碱的缓冲容量及区域分异特征,并分析影响河水水质的地球化学因素。     

秃尾河流域表生生态环境现状评价

以地下水为主线,开展流域表生生态环境评价的方法研究尚处于发展之中。以秃尾河流域为例,紧紧围绕地下水这条主线,在建立流域表生生态环境递阶层次评价指标体系和评价标准的基础上,尝试采用模糊综合评判方法与模糊迭代自组织数据分析技术相结合,开展流域表生生态环境现状评价。评价结果表明,流域生态环境现状总体较好,其中盖沙丘陵区、河流源头和河谷阶地区及沙漠区是水资源与生态环境保护的重点,这些研究为评价生态环境脆弱区水资源开发利用对表生生态环境的影响以及保护流域水资源与生态环境提供了科学依据。评价结果与流域生态环境实际更为吻合,规律性更明显。     

艾比湖流域主要河流径流量的多年变化

1 主要河流的选择历史上与艾比湖有联系的河流约有23条,较大的有塔城地区的奎屯河及其主要支流四棵树河和古尔图河,博尔塔拉蒙古自治州的托托河、精河、阿卡尔河、博河和大河沿子河.上述河流大部源于天山北坡,部分源自阿拉套山南坡:根据上述河流产流特性,本文选择博河、精河、奎屯河及其支流四棵树河为代表(以下概称四河),探讨径流变化趋势,四河均在河流出     

海洋中也有河流雪山瀑布

辽阔而美丽的海洋，碧波万里，骄姿万千。在浩瀚的海水中有着奔腾的河流，美丽的山山和雄伟的瀑布，从而构成了令人神往的海中景象。     

Sedimentary facies of Maastrichtian to Danian deposits in Amur River area, Russian Far East

Sedimentary facies of the Tsagayan Formation is distributed in the eastern Zeya-Bureya Basin has been analyzed. The formation is of the Maastrichtian to Danian in age and characterized by the cyclicity of the fining-upwards successions. Analysis of environmental changes during the K/T boundary is the focus of this study. Five facies have been identified: Facies A, thick and laterally extensive coarse-grained to medium-gained sandstone units, interpreted as channelfill deposits; Facies B, parallel-laminated to massive mudstone units interpreted as interchannel lakes and flood plain deposits; Facies C, sheet-like medium-grained to fine-grained sandstones interpreted as crevasse splay deposits; Facies D, coal to coaly mudstone beds interpreted as deposits of peatlands; Facies E, very poorly sorted sandy mudstone beds interpreted as debris flow deposits. Fluvial environments with the low-relief fiat topography was inferred. A channel transported large volumes of clasts, and a flood basin with interchannel lakes and peatlands was deciphered. Any distinct change of sedimentary environments has not been identified throughout the Tsagayan Formation (including the K/T boundary). However, two beds of debris flow deposits were identified. The one occurs at the uppermost part of the lower Tsagayan Subformation and contains dinosaur fossils. The other is intercalated in the upper Tsagayan Subformation.