Development of Flow Duration Curves for Malaprabha and Ghataprabha sub basins of Krishna River

  Laxmi R Mamadapur,  Anand V.Shivapur,  B K. Purandara

Abstract¬—The linking of hydrologic processes with ecological outcomes is a starting point for effective, holistic stream restoration design. The basic parameters which are essentially part of the stream flow hydrograph that regulate ecological processes in riverine ecosystem includes magnitude, frequency, duration, timing, and rate of change. Quantification of magnitude, frequency, and duration may be at least in part may be understood through flow duration curve (FDC). FDCs illustrate the percent of time a flow occurred during a given period of record and provide a wealth of information regarding the flow character of a river which is highly essential for river hydrology and ecological studies. In the present study the flow duration curves were derived for two sub basins of Krishna River catchment namely Malaprabha and Ghataprabha basins. The estimated discharge of Malaprabha river corresponding to probability of exceedance of 30%, 50% and 90% are found to be 53.77 m3/sec, 19.68 m3/sec and 0.94m3/sec respectively. In the case of Ghataprabha, the flow varies between 12.73 m3/sec,78.01m3/sec and 12.73 m3/sec with probability of exceedance of 30, 50and 90 per cent respectively. The steep slope found in both the basins throughout indicates a highly variable stream whose flow is largely due to quick runoff of rainfall to the stream. The estimated flow is quite significant in determining the minimum flow required to keep the ecological balance in the stream channel.

Keywords- Index Terms— Probability of exceedence, Flow Duration Curve (FDC), Catchment, Frequency curve

Unique Identification Number - IJEDR1703110
Page Number(s) - 763-767
Pubished in - Volume 5 | Issue 3 | August 2017
DOI (Digital Object Identifier) -   
Publisher - IJEDR (ISSN - 2321-9939)

  Laxmi R Mamadapur,  Anand V.Shivapur,  B K. Purandara,   "Development of Flow Duration Curves for Malaprabha and Ghataprabha sub basins of Krishna River", International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.5, Issue 3, pp.763-767, August 2017, Available at :http://www.ijedr.org/papers/IJEDR1703110.pdf