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GIS-based morphometric analysis of sub-watersheds at Tut river basin, Mizoram

机译：基于GIS河流河流域米流域的形态学分析

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The Tut river basin covers an area of 846 km~2 comprises of seven sub-watersheds namely Tuichar Lui, Dap Lui, Tlubing Lui, Chal Lui, Raiseh Lui, Telva Lui, Zawngek Lui. The drainage network of the sub watersheds was delineated and mapped using Survey of India toposheets and satellite imagery (IRS P6, LISS-III, FCC, Geocoded) on 1:50,000 scale. The morphometric analysis, digitization and statistical computation were carried out with the help of ArcGIS 9.3 software. The drainage network showed that dendritic and sub-dendritic with parallel drainage pattern spreads over the entire river basin. The highest stream order is the 6th order and the maximum stream number is 2029 first order 441 second order, 105 third orders and so on. Drainage density ranges from 0.37 to 4.66, stream frequency range between 0.65 and 8.10 and drainage texture varies from 5.63 to 19.56 showed that the area is characterized by permeable soils, soft sedimentary rocks such as sandstones and siltstones/shales with narrow valleys, dense floral coverage and high relief. The mean bifurcation ratio ranges between 3.03 to 6.58 indicate strong structural control over the area. The elongation ratio of sub-watersheds in the range 0.34 to 0.90 depicts sub-watersheds are more or less elongated characterizes high relief and steep slopes. The relief ratio ranges from 0.013 to 0.184 reflects high relief in the study area. The present study is an attempt to understand the nature of drainage and topography of river basin in order to implement sustainable development and management plan and practices at sub-watersheds level. Remote sensing and GIS proved to be an efficient tool and techniques for this investigation.
机译：啧啧流域占地面积846公里〜2只包括七个区域即子流域Tuichar吕，吕沓，Tlubing吕，吕CHAL，Raiseh吕，吕Telva，Zawngek吕。子流域排水管网被划定并上1使用印度toposheets和卫星图像（IRS P6，LISS-III，FCC，地理编码）的调查映射：50,000规模。在形态分析，数字化和统计计算用的ArcGIS 9.3软件的帮助下进行的。排水管网表明，树枝状和子树突与在整个流域平行排水图案差。最高流顺序是6阶和最大流编号为2029的一阶441秒顺序，105个第三会等。排水密度范围从0.37至4.66，流频率范围为0.65和8.10和排水纹理之间变化从5.63到19.56表明，区域的特征是可渗透的土壤，软沉积岩如砂岩和粉砂岩/窄谷页岩，密花覆盖和高浮雕。之间3.03至6.58的平均分枝率范围表示在区域强的结构的控制。子流域在0.34至0.90描绘子流域或多或少细长特征化高浮雕和陡坡的范围内伸长率。凸版比范围从0.013至0.184反映研究区高浮雕。本研究是试图了解排水和流域地形的性质，以落实小流域层面的可持续发展和管理计划和做法。遥感和地理信息系统被证明是一个有效的工具和技术，针对此事展开调查。

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