کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8907418 | 1635086 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Evaluation of automatic drainage extraction thresholds using ASTER GDEM and Cartosat-1 DEM: A case study from basaltic terrain of Central India
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم زمین و سیاره ای (عمومی)
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چکیده انگلیسی
In the study, the digital elevation models from ASTER GDEM and Cartosat-1 of 30Â m resolution were used to evaluate the thresholds in automatic extraction of stream network at six thresholds of 0.05Â km2, 0.125Â km2, 0.25Â km2, 0.50Â km2, 1.0Â km2 and 2.0Â km2 in Neri watershed in basaltic terrain of Central India. At stream thresholds of 0.05Â km2, Cartosat-1 DEM shows higher channel initiation points (150) than ASTER (127). As we increase the stream thresholds from 0.05Â km2 to 2.0Â km2, the channel initiation points are consistently decreased in two input DEMs. The correlation coefficient R2 between the drainage area thresholds and stream length for ASTER and Cartosat-1 DEM shows 0.94 and 0.92, respectively. The comparative evaluation of morphometric indices shows that threshold of 0.05Â km2 is found to be optimum to obtain the finer drainage networks particularly from Cartosat-1 DEM, when compare to the ASTER GDEM of same resolution.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Egyptian Journal of Remote Sensing and Space Science - Volume 21, Issue 1, April 2018, Pages 95-104
Journal: The Egyptian Journal of Remote Sensing and Space Science - Volume 21, Issue 1, April 2018, Pages 95-104
نویسندگان
G.P. Obi Reddy, Nirmal Kumar, Nisha Sahu, S.K. Singh,