Impacts of agricultural intensification on the hydrologic components for a coastal river basin using coupled hydrological model

IF 4.9 Q2 ENGINEERING, ENVIRONMENTAL

Groundwater for Sustainable Development Pub Date : 2025-03-21 DOI:10.1016/j.gsd.2025.101440

Landa Sankarrao, Maheswaran Rathinasamy

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Abstract

Understanding the impacts of the changes in land use and cover (LULC) on the hydrological components was a prime factor for water resource management (SDG 6). Among the different LULC change patterns, agricultural intensification has recently been identified in various parts of the globe. The present study aims to understand the impacts of intensification of agricultural land use (Sankarrao et al.,2021) on the hydrological components within the Nagavali River Basin (NRB) catchment, India. In this context, the fully distributed hydrodynamic MIKESHE model was calibrated well from 2004 to 2014, with an NSE of 0.76 and 0.86 on daily and monthly time scales, respectively. Three scenarios were developed, namely baseline, past, and future scenarios, using three LULC maps of 1990, 2010, and 2030 to evaluate the impact of the intensification of agricultural land use on the hydrological components. The intensification of agricultural land use is due to the reduction in scrubland land use and forest land use (SDG 15) between 1990 to 2010 and 2010 to 2030, respectively. The annual average values of surface runoff, baseflow, and groundwater recharge were increased by 48.45 mm, 2.55 mm, and 22.45 mm, respectively, over the two comparison periods. On the other hand, a reduction of 59.55 mm was observed in the annual average AET at 59.55 mm/year. The Pearson correlation was used to identify the attribution of different LULC changes with hydrological components. The changes in agricultural land use positively correlate with changes in surface runoff, baseflow, and groundwater recharge, whereas actual evapotranspiration has a negative correlation. The spatial distribution of these hydrological component changes was identified at the sub-basin level. Overall, the results explained that the intensification of agricultural land use has increased surface runoff and groundwater recharge within the basin.

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来源期刊

Groundwater for Sustainable Development Social Sciences-Geography, Planning and Development

CiteScore

11.50

自引率

10.20%

发文量

152

期刊介绍： Groundwater for Sustainable Development is directed to different stakeholders and professionals, including government and non-governmental organizations, international funding agencies, universities, public water institutions, public health and other public/private sector professionals, and other relevant institutions. It is aimed at professionals, academics and students in the fields of disciplines such as: groundwater and its connection to surface hydrology and environment, soil sciences, engineering, ecology, microbiology, atmospheric sciences, analytical chemistry, hydro-engineering, water technology, environmental ethics, economics, public health, policy, as well as social sciences, legal disciplines, or any other area connected with water issues. The objectives of this journal are to facilitate: • The improvement of effective and sustainable management of water resources across the globe. • The improvement of human access to groundwater resources in adequate quantity and good quality. • The meeting of the increasing demand for drinking and irrigation water needed for food security to contribute to a social and economically sound human development. • The creation of a global inter- and multidisciplinary platform and forum to improve our understanding of groundwater resources and to advocate their effective and sustainable management and protection against contamination. • Interdisciplinary information exchange and to stimulate scientific research in the fields of groundwater related sciences and social and health sciences required to achieve the United Nations Millennium Development Goals for sustainable development.