Models for Estimating Precipitable Water Vapour and Variation of Dew Point Temperature with Other Parameters at Owerri, South Eastern, Nigeria
Davidson Odafe Akpootu,
Mukhtar Isah Iliyasu,
Wahidat Mustapha,
Simeon Imaben Salifu,
Hassan Taiwo Sulu,
Samson Philip Arewa,
Mohammed Bello Abubakar
Issue:
Volume 8, Issue 3, June 2019
Pages:
28-36
Received:
26 August 2019
Accepted:
16 September 2019
Published:
9 October 2019
Abstract: Precipitable water vapour (PWV) is a vital component of the atmosphere and appreciably controls many atmospheric processes. The PWV is not easy to measure with sufficient spatial and time resolution under all weather conditions. In this paper, three precipitable water vapour models; the Smith, Won and Leckner’s models were evaluated and compared for Owerri (Latitude 5.48°N, Longitude 7.00°E, and 91 m above sea level) using meteorological parameters of monthly average daily maximum temperature, minimum temperature and relative humidity during the period of sixteen years (2000-2015). The Leckner’s model was found most suitable and therefore recommended for estimating PWV for the location with range between 3.253 and 4.662 cm. The highest PWV occurred in June for Won and Leckner’s models while for Smith’s model it occurred in September; the lowest PWV occurred in January for all the evaluated models. The result showed that high values of dew point temperature (Tdew), PWV and relative humidity (RH) were observed during the raining season and low values in the dry season; this is an indication that the dew point temperature is a reflection of the PWV and RH. The dew point temperature is an opposite reflection of the virtual temperature (Tvirtual), potential temperature (Tpotential) and mean temperature (Tmean). The dew point temperature increases and decreases with mean temperature in the months from January to March and in July respectively for the location under investigation. The values of the dew point temperature indicated that the air is stable signifying no development of severe weather condition like thunderstorms. The maximum and minimum virtual temperature correction of 3.3246°C and 2.3371°C occurred in June and January respectively while for the dew point depression, it occurred in the months of January and September with 8.7514°C and 2.1094°C. The descriptive statistical analysis shows that the dew point temperature, potential temperature, mean temperature and virtual temperature correction data spread out more to the left of their mean value (negatively skewed), while the virtual temperature and dew point depression data spread out more to the right of their mean value (positively skewed). The dew point temperature and the virtual temperature correction data have positive kurtosis which indicates a relatively peaked distribution and possibility of a leptokurtic distribution while the virtual temperature, potential temperature, mean temperature and dew point depression data have negative kurtosis which indicates a relatively flat distribution and possibility of platykurtic distribution.
Abstract: Precipitable water vapour (PWV) is a vital component of the atmosphere and appreciably controls many atmospheric processes. The PWV is not easy to measure with sufficient spatial and time resolution under all weather conditions. In this paper, three precipitable water vapour models; the Smith, Won and Leckner’s models were evaluated and compared fo...
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Geoelectrical Investigation of Groundwater Potential, at Bosso Campus, Minna, Niger State, Nigeria
Aisha Alkali,
Jamilu Shehu,
Usman Defyan Alhassan,
Kazeem Adeyinka Salako,
Abdulwaheed Adewuyi Rafiu,
Abbas Adebayo Adetona,
Usman Usman Hussaini
Issue:
Volume 8, Issue 3, June 2019
Pages:
37-43
Received:
18 June 2019
Accepted:
10 July 2019
Published:
12 October 2019
Abstract: Geoelectrical investigation of groundwater potential has been carried out at Bosso Staff Quarters Bosso campus, Federal university of Technology, Minna. The area is situated on latitude 9038’55.8”N and 9039’29.0”N and longitude 6031’19.7”E and 6031’46.7”E. the survey was carried out with the aim of delineating the potential area for groundwater development and depth to the groundwater within the study area. The Schlumbeger array was used to sound six profiles with a total of 36 Vertical Electrical Sounding (VES) points. The sounding interpretation results were used to generate geoelectric section. The corresponding geologic section were also generated which revealed the existence of three subsurface layers. These layers revealed the existence of three subsurface layers. These layers comprise the top soil, weathered/fractured basement and fresh basement. The results of this analysis are presented as curves of apparent resistivity versus depth, from the digitalized curves obtained from the IP2WIN software, sulfur 11 was used to generates iso-resistivity map at different depth. The analysis of results shows that the area is not appropriate for borehole drilling.
Abstract: Geoelectrical investigation of groundwater potential has been carried out at Bosso Staff Quarters Bosso campus, Federal university of Technology, Minna. The area is situated on latitude 9038’55.8”N and 9039’29.0”N and longitude 6031’19.7”E and 6031’46.7”E. the survey was carried out with the aim of delineating the potential area for groundwater dev...
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