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 : 2025-02-01 DOI:10.1016/j.uclim.2025.102285

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

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引用次数: 0

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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利用SWAT模型评价印度哥印拜陀Noyyal流域水文行为变化

该研究旨在利用SWAT模型评估Noyyal流域的水文行为变化。SWAT模型被用来模拟包括降雨、温度、相对湿度、风速和太阳辐射在内的总计15年的信息。选择不确定拟合程序（SUFI-2）作为灵敏度分析、校准和验证的模型。水文活动模型与DEM、LULC数据、土壤和气候数据一起用于两种类型的敏感性分析，如单次敏感性分析和全球敏感性分析。在这项研究中，每月对河流流量和产沙量进行校准和验证。校准始于2003年至2014年的12年期间，而验证实际发生在2011年至2014年的4年期间。PBIAS、NSE、PSR和R2统计指标表明，该模型在模拟水文方面表现“优异”。与各种自动校准技术相比，SUFI-2被观察到非常可接受且易于使用。在过去的二十年里，诺雅尔流域的水文行为发生了巨大变化。

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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[...]