Development of a mathematical model for the quantification of fog-collection

Monzur Alam Imteaz, Ghassan Al-hassan, Abdallah Shanableh and Jamal Naser

Resources, Conservation & Recycling, 2011, vol. 57, issue C, 10-14

Abstract: With the impacts of climate change and impending crisis of potable water, potential sustainable sources of water are under investigations. One of such potential sources is fog water collection. In the past, collection of fog water was considered negligible and non-worthy. However, recent studies suggest that fog-water collection can be a reasonable sustainable source of water depending on favorable topographic and atmospheric conditions. This paper presents development of a mathematical model for fog-formation and eventual quantification of fog-water collection. The National Oceanic and Atmospheric Administration (NOAA) equation for dew point calculation has been modified and extended to incorporate effects of different climatic parameters on fog formation. A new parameter named Fog Potential Index (FPI), which is a function of difference between dew point and air temperature for a particular location has been introduced and defined. NOAA proposed an equation to calculate dew point based on actual water vapor pressure in the air, which can be calculated from dry bulb temperature of the air and relative humidity. Following calculation of average dew point using NOAA equation between a timestep, FPI was calculated for a particular time step. FPI for each timestep was multiplied with the humidity factor, wind velocity factor and area of the fog collector to incorporate the effects of humidity ratio, wind velocity and fog collector area in the quantification of fog water. Effect of wind velocity on fog formation has been discussed. It was found that wind velocity has got two-fold impacts on the formation of fog; (i) for a lower wind velocity upto a certain threshold value, fog formation increases with velocity as old condensed moist air is continuously replaced by new moist air, and (ii) for a higher wind velocity (beyond the threshold value), fog formation decreases with velocity due to disturbance in the formation of fog. The developed model was calibrated using fog-water collection experimental data from Asir region of Saudi Arabia.

Keywords: Fog water; Fog Potential Index; Humidity ratio; Wind velocity; Dew point (search for similar items in EconPapers)
Date: 2011
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0921344911001947
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:recore:v:57:y:2011:i:c:p:10-14

DOI: 10.1016/j.resconrec.2011.09.014

Access Statistics for this article

Resources, Conservation & Recycling is currently edited by Ming Xu

More articles in Resources, Conservation & Recycling from Elsevier
Bibliographic data for series maintained by Kai Meng ().