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Investigación de vangarda para o desenvolvemento sostible

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2020

Tamagnone, Paolo; Cea-Gómez, Luis; Comino, Elena; Rosso, Maurizio

Rainwater Harvesting Techniques to Face Water Scarcity in African Drylands: Hydrological Efficiency Assessment Journal Article

In: Water, vol. 12, no. 9, pp. 2646, 2020, ISSN: 2073-4441.

Abstract | Links | BibTeX | Etiquetas: climate-smart agriculture, crop water stress, Hydrological modeling, rainwater harvesting techniques, Sahel, sustainable land and water management, water balance

@article{tamagnone_rainwater_2020,

title = {Rainwater Harvesting Techniques to Face Water Scarcity in African Drylands: Hydrological Efficiency Assessment},

author = {Paolo Tamagnone and Luis Cea-Gómez and Elena Comino and Maurizio Rosso},

url = {https://www.mdpi.com/2073-4441/12/9/2646},

doi = {10.3390/w12092646},

issn = {2073-4441},

year  = {2020},

date = {2020-09-01},

urldate = {2026-08-06},

journal = {Water},

volume = {12},

number = {9},

pages = {2646},

publisher = {Multidisciplinary Digital Publishing Institute},

abstract = {The sub-Saharan climate is experiencing a marked increase in temperature and intensification of precipitation intensity and variability. Besides, longer dry spells are compromising the reliability of local agricultural practices. The present study provides a comprehensive investigation about the benefits induced by using indigenous rainwater harvesting techniques (RWHT) against hydrometeorological threats affecting the Sahelian areas. Different RWHT have been tested in term of runoff retention, infiltration increase into the root zone, and soil water stress mitigation. To achieve these purposes, hydrological processes at the field scale have been investigated using a two-dimensional distributed hydrological model. To make the study representative of the whole Sahelian areas, several simulations were carried out adopting a wide range of input parameters based on conventional values of those areas. The results reveal that RWHT may lead to a runoff retention up to 87% and to double the infiltration. Intercepting and storing runoff, RWHT increase the water content in the root zone and the right design can diminish the crop water stress. Furthermore, the results show that adopting RWHT makes it possible to extend the growing season up to 20 days, enhancing the yield. These benefits contribute to the reduction of the climate-related water stress and the prevention of crop failure.},

keywords = {climate-smart agriculture, crop water stress, Hydrological modeling, rainwater harvesting techniques, Sahel, sustainable land and water management, water balance},

pubstate = {published},

tppubtype = {article}

}