Title: Long-term spatial and temporal trend analysis of stream flow and suspended sediment transport of Godavari River Basin, India

Authors: Madhura C. Aher; S.M. Yadav

Addresses: Civil Engineering Department, Sardar Vallabhai National Institute of Technology, Surat, Pin Code: 395007, Gujarat, India ' Civil Engineering Department, Sardar Vallabhai National Institute of Technology, Surat, Pin Code: 395007, Gujarat, India

Abstract: Long-term spatial and temporal variations of stream flow and suspended sediment discharge of rivers are important for effective planning of available water resources and soil conservation measures. In the present study, the gradual and abrupt change in stream flow and suspended sediment discharge at 21 stream gauging stations which are located on the Godavari River were analysed for the period of 1969 to 2015 (46 years). The Mann-Kendall (MK) trend test and the Pettitt test are used to detect gradual and abrupt changes, respectively. The results of MK test indicates that 76% stations show decreasing trend in stream flow, whereas 90% stations show decreasing trend in suspended sediment discharge. The abrupt change is reported in the early and middle period of 1990 to 2000. The significant decreasing trend in stream flow and sediment discharge is due to the construction of extensive dams, land use change and rainfall pattern.

Keywords: Godavari Basin; stream flow; suspended sediment discharge; trend; change point.

DOI: 10.1504/IJHST.2024.136459

International Journal of Hydrology Science and Technology, 2024 Vol.17 No.2, pp.134 - 161

Received: 08 May 2021
Accepted: 16 Oct 2021
Published online: 02 Feb 2024 *

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