Corrigendum: Water Science and Technology: Water Supply 18 (2), 357–370: Hydrogeochemistry and groundwater mixing close to an oil field: an example from Asmari karstic aquifer, Khuzestan, Iran

Abstract Both carbonate (as the oil-gas reservoir) and evaporite rocks (as caprock) coexist in the Masjed Soleyman oil field. The Asmari karstic aquifer is formed within Oligo-Miocene carbonate rocks in the south of the oil reservoir. A mixing between fresh karstic groundwater and oil-field brines is to be expected because of underground migration of the brines toward the aquifer. This process can reduce the groundwater quality by both increasing the water salinity and by adding hydrocarbon and sulfur contaminants into the groundwater. Tembi river contains saline water that can affect groundwater resources. Leaking of these brines into the aquifer was distinguished using total dissolved solids, the relative concentration of major elements, bromide ion (as a trace element), total organic carbon, ion ratios, and mixing curve diagrams. The polluted zone was determined by tracking the hydrochemistry changes across the groundwater flow direction. The volume percentage of different water sources in mixed groundwater was calculated and validated using PHREEQC software. The results revealed that the contribution of the oil-field brine in the groundwater is much lower than the salty river brine, but even this low amount has a considerable impact on water quality by increasing water salinity and adding hydrocarbon and sulfur into the groundwater.

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Corrigendum: Water Science and Technology 83 (11), 2575–2596: Review of the hydraulic capacity of urban grate inlet: a global and Latin American perspective, M. Cárdenas-Quintero; F. Carvajal-Serna, doi.org/10.2166/wst.2021.151

Water Science & Technology ◽

10.2166/wst.2021.604 ◽

2021 ◽

Keyword(s):

Latin American ◽

Science And Technology ◽

American Perspective ◽

Water Science

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Hydraulic Performance Analysis and Modeling of Water Supply Distribution System of Addis Ababa Science and Technology University, Ethiopia

10.20944/preprints202002.0149.v1 ◽

2020 ◽

Author(s):

Chalchisa Milkecha ◽

Habtamu Itefa

Keyword(s):

Water Supply ◽

Water Demand ◽

Distribution System ◽

Distribution Systems ◽

Water Distribution ◽

Addis Ababa ◽

Science And Technology ◽

Hydraulic Performance ◽

Alternative Methods ◽

The University

This study was conducted generally by aiming assessment of the hydraulic performance of water distribution systems of Addis Ababa Science and Technology University (AASTU). In line with the main objective, this study addressed, (1) pinpointing problems of existing water supply versus demand deficit (2) evaluating the hydraulic performance of water distribution system using water GEMS and (3) recommended alternative methods for improving water demand scenarios. The University’s water supply distribution network layout was a looped system and the flow of water derived by both gravity and pressurized system. The gravity flow served for the academic and administrative staffs whereas the pressurized system of the network fed the students dormitories, cafeteria’s etc. The study revealed the existence of unmet minimum pressure requirement around the student dormitories which accounts 25.64% below the country’s building code standard during the peak hour consumption. The result of the water demand projection showed an increment of 2.5 liter per capita demand (LPCD) in every five years. Hence, first, the university’s water demand was projected and then hydraulic parameters such as; pressure, head loss and velocity were modeled for both the existing and the improved water supply distribution. The finding of the study was recommended to the university’s water supply project and institutional development offices for its future modification and rehabilitation works.

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