Study of Physicochemical Parameters of Rainwater: A Case Study of Karachi, Pakistan

Chughtai, Mahwish; Mustafa, Sana; Mumtaz, Majid

doi:10.4236/ajac.2014.54029

Cited by 22 publications

(12 citation statements)

References 25 publications

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“…Results indicate that dissolved oxygen remained above the limit. In rainwater, the values measured by Chughtai et al [45] varied from 6.3 to 8.2 mg/L, i.e., similar to those found in this study.…”

Section: Discussionsupporting

confidence: 90%

Filtering Capability of Porous Asphalt Pavements

Thives¹,

Ghisi²,

Brecht³

et al. 2018

Water

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The objective of this study is to assess the filtering capability of porous asphalt pavement models and the quality of rainwater filtered by such models. Three slabs of porous asphalt mixtures and two models composed of porous layers that resulted in porous pavement structures were produced. Data were collected in two phases: using rainwater directly from the sky and then using stormwater runoff collected from a street. Parameters such as pH, dissolved oxygen, ammonia, phosphorus, nitrite, aluminium, chromium, copper, zinc, and iron were measured. For both rainwater and stormwater runoff quality analyses, there was an increase in the concentration of the following parameters: phosphorus, iron, aluminium, zinc, nitrite, chromium, copper, and pH; there was no significant variation in the concentration of dissolved oxygen; and there was a decrease in ammonia in one of the models. However, the concentrations of only phosphorus and aluminium exceeded the limits established by the Brazilian National Environmental Council and National Water Agency for the use of non-potable water. The models were capable of filtering rainwater and stormwater runoff, and reducing the concentration of ammonia. It can be concluded that it is possible to collect stormwater runoff from porous asphalt surfaces and porous asphalt pavements. Porous asphalt pavements are able to filter out certain pollutants from stormwater runoff and rainwater, and were shown to be an alternative to supply rainwater for non-potable uses and to recharge the water table.

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Section: Discussionsupporting

confidence: 90%

Filtering Capability of Porous Asphalt Pavements

Thives¹,

Ghisi²,

Brecht³

et al. 2018

Water

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show abstract

“…Results indicate that dissolved oxygen remained above the limit. In rainwater, the values measured by Chughtai et al, (2014) [45] varied from 6.3 to 8.2 mg/L, that is, similar to those found in this study.…”

Section: Discussionsupporting

confidence: 88%

Filtering Capability of Porous Pavements

Thives

Ghisi

Brecht

et al. 2017

The 2nd International Electronic Conference on Water Sciences

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Abstract:The objective of this study is to assess the filtering capability of porous pavement models and the quality of rainwater and stormwater filtered by such models. Three slabs of porous asphalt mixtures and two systems composed of porous layers that resulted in porous pavement structures were produced. Data were collected in two phases: using rainwater directly from the sky and then using stormwater collected from a street. The models with different layers were assembled in acrylic boxes and rainwater was stored in the boxes in each rainfall event. Parameters such as pH, dissolved oxygen, ammonia, phosphorus, nitrite, aluminium, chromium, copper, zinc and iron were measured. The infiltration capacity of the models varied from 83.4% to 83.7%. For both rainwater and stormwater quality analyses, there was an increase in the concentration of the following parameters: phosphorus, iron, aluminium, zinc, nitrite, chromium, cooper and pH; there was no significant variation in the concentration of dissolved oxygen; and there was a decrease in ammonia in one of the models. However, the concentrations of only phosphorus and aluminium exceeded the limits established by the Brazilian National Environmental Council and National Water Agency for the use of non-potable water. The models were capable of filtering rainwater and stormwater, and reducing the concentration of ammonia. It can be concluded that it is possible to collect stormwater from asphalt porous surfaces and porous pavements. Porous pavements are able to filter out certain pollutants from stormwater and rainwater, and were shown to be an alternative to harvest rainwater for non-potable uses and to recharge the water table.

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“…These findings were in agreement with some previous studies in different areas where almost physicochemical parameters of rainwater found safe and met the WHO standards [8][9][10]. pH value: The results showed that the pH values of rainwater were higher (more alkaline) than those in some previous studies.…”

Section: The Rainwater Characteristicssupporting

confidence: 92%

Assessment of the Roof - Harvested Rainwater Quality in Some Suburb Districts, Hanoi, Viet Nam

Hà¹

2018

JST

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In this paper, the quality of roof harvested rainwater in Dan Phuong, Phuc Tho and Ung Hoa districts, Ha Noi city was assessed. Roof-harvested rainwater were taken in 2 campaigns (November 2015 and April 2016) then analyzed according to the QCVN 01:2009/BYT. The findings showed that in the studied districts, rainwater was collected from the tile, concrete, fibro cement and metal roofing, of which tile roof is the most common one which accounted for 65.6 %. The quality of roof-harvested rainwater in general was rather good. However, parameters including pH, permanganate value, total coliform and Ecoli did not meet the standards. nd campaign, respectively. In the 1 st campaign, the total coliforms and E.coli were detected in 75 and 72 % of the roof harvested rainwater samples, respectively; while in the 2 nd campaign these numbers were 62 and 38 %, respectively.

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Study of Physicochemical Parameters of Rainwater: A Case Study of Karachi, Pakistan

Abstract: The urban centers of developing countries like Karachi city in Pakistan are facing the menace of air pollution and atmospheric wet deposition can be used as a tool for monitoring the quality of air.

Cited by 22 publications

References 25 publications

Filtering Capability of Porous Asphalt Pavements

Filtering Capability of Porous Asphalt Pavements

Filtering Capability of Porous Pavements

Assessment of the Roof - Harvested Rainwater Quality in Some Suburb Districts, Hanoi, Viet Nam

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