Assessment of surface water potential using morphometry and curve number-based approaches. Issue 11 (2nd November 2017)

• Record Type: Journal Article
• Authors: Nidhi, K.; Chowdary, V. M.; Tiwari, K. N.; Shinde, V.; Dadhwal, V. K.
• Is Part Of: Geocarto international. Volume 32:Issue 11(2017)
• Page Start: 1206
• Page End: 1228
• Publication Date: 2017-11-02
• Subjects: Run-off -- morphometric parameters -- maximum potential retention parameter -- NRCS-CN; Remote sensing -- Periodicals; Geographic information systems -- Periodicals; Geology -- Periodicals; Cartography -- Periodicals; 621.3678
• DOI: 10.1080/10106049.2016.1195889
• Languages: English
• ISSNs: 1010-6049

Abstract

Abstract: Geomorphic and curve number-based run-off estimation approaches are proposed in this study for Olidih watershed, India. Cartosat Digital Elevation Model derived morphometry parameters were used for the computation of run-off. The observed and predicted run-off are uniformly scattered around 1:1 line and coefficient of correlation ( R 2 ) is found to be around 0.94 in case of NRCS-CN method. Run-off assessment computed using geomorphological parameters and NRCS-CN approach has improved with the introduction of rainfall correction factor. The improved R 2 from 0.3 to 0.86 in this case was attributed to rainfall correction factor computed based on the long-term rainfall average of the study area. Run-off assessment made using composite parameter approach shows R 2 values of 0.98 and 0.82 for different initial abstraction losses 0.2 and 0.3, respectively, and has indicated better prediction. Therefore, proposed morphometry-based approaches can be explored as an alternative for simulating the hydrological response of the watersheds.