Assessment of hydrological behavioural changes of Noyyal watershed in Coimbatore district, India by using SWAT model

IF 6 2区工程技术 Q1 ENVIRONMENTAL SCIENCES

Urban Climate Pub Date : 2025-01-13 DOI:10.1016/j.uclim.2025.102285

Thangavelu Arumugam, Sapna Kinattinkara, Sampathkumar Velusamy, Manoj Shanmugamoorthy, Senthilkumar Veerasamy

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Abstract

The study aims to assess the hydrological behavioural changes of the Noyyal watershed, using the SWAT model. The SWAT model was used to stimulate a total of 15 years' of information on factors including rainfall, temperature, relative humidity, wind speed, and solar radiation. It was chose to study the Uncertainty Fitting procedure (SUFI-2) as the model for sensitivity analysis, calibration, and validation. The hydrological activity models were used with DEM, LULC data, soil, and climatological data for both types of sensitivity analyses, such as one-at-a-time and global sensitivity analysis. In this study, stream flow and sediment yield were calibrated and validated on a monthly basis. Calibration began over a 12-year period from 2003 to 2014, while validation actually occurred over a four-year period from 2011 to 2014. PBIAS, NSE, PSR, and R2 statistical indices show the model performs “excellently” at simulating hydrology. In comparison to the various automatic calibration techniques, SUFI-2 was observed to be very acceptable and simple to use. The hydrological behaviour of the Noyyal watershed has changed dramatically over the last two decades.

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来源期刊

Urban Climate Social Sciences-Urban Studies

CiteScore

9.70

自引率

9.40%

发文量

286

期刊介绍： Urban Climate serves the scientific and decision making communities with the publication of research on theory, science and applications relevant to understanding urban climatic conditions and change in relation to their geography and to demographic, socioeconomic, institutional, technological and environmental dynamics and global change. Targeted towards both disciplinary and interdisciplinary audiences, this journal publishes original research papers, comprehensive review articles, book reviews, and short communications on topics including, but not limited to, the following: Urban meteorology and climate[...] Urban environmental pollution[...] Adaptation to global change[...] Urban economic and social issues[...] Research Approaches[...]