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University of Peshawar (2019)

Environmental Sustainability Analysis of Water Footprints of Peshawar Basin, Pakistan.

Khan, Tariq

Titre : Environmental Sustainability Analysis of Water Footprints of Peshawar Basin, Pakistan.

Auteur : Khan, Tariq

Université de soutenance : University of Peshawar

Grade : Doctor of Philosophy (PhD) 2019

Résumé partiel
Water is a fundamental resource for sustainable social and economic development of any country. Freshwater resources are becoming scarce due to inevitable demand for food, industrial development and growing urban and rural population. Over the last few decades, demand for the agricultural products has been increased due to the population and economic growth. This has exerted immense pressure on the available water resources. Pakistan is located in the arid region of the world with an average annual rainfall less than 240 mm. Being an agriculture based economy the availability of fresh water is essential for sustainable economic development. The goal of this research was to analyze the environmental sustainability of blue, green and grey water footprint in Peshawar Basin during the period 1986 to 2015. The basin is located in the northwest of Indus Basin at longitude of 710 15/ and 720 45/ E and latitude 330 45/ and 340 30/ N in Khyber Pakhtunkhwa province of Pakistan that covers an area of 5617 km2 and has 9.78 million inhabitants. Blue and green water scarcity was selected as an indicator to assess the environmental sustainability of water footprints. Further, the study was aimed to assess the potential impact of dam on Kabul river water pollution. The water pollution level was estimated under normal and reduced runoff scenarios for an increased upstream use of water from Kabul River in Afghanistan. The annual blue and green water availability and scarcity was calculated following global water footprint assessment standard during the period 1986-2015 and annual blue and green water footprints of crops were estimated using AquaCrop model. The AquaCrop output was post-processed to separate incoming and outgoing water fluxes and soil water content into blue and green water components ; considering blue water fluxes from irrigation and capillary rise. Consequently, evapotranspiration (ET) originating from irrigation water, capillary rise and rainwater was tracked out. Grey water footprints is used as an indicator to assess environmental sustainability related to nitrogen (N) and phosphorus (P) pollution in Peshawar Basin, Pakistan. The N and P pollutants load from artificial fertilizers, animal manure, household and industrial sources were considered during 1986 to 2015. The results showed that per capita water availability dropped from 1700 m3 per in 1986 to 600 m3 in 2015. In terms of per capita water availability the basin has turned from “water stressed” in 1986 to “water scarced’ in 2015. Further, both the blue and green water footprint of agriculture has decreased from 2139 million m3 in 1986 that reduced to 1738 million m3 in xi 2015

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Page publiée le 21 avril 2021, mise à jour le 22 mai 2022