Estimation of Rainfall Patterns in Bangladesh Using Different Computational Methods (Arithmetic Average, Thiessen Polygon and Isohyet)
Journal Title: Journal of Biodiversity and Environmental Sciences (JBES) - Year 2015, Vol 8, Issue 1
Abstract
The present study was conducted to measure the total amount of annual rainfall all over the Bangladesh by different computational methods (Arithmetic average, Thiessen polygon and Isohyet). The rainfall data (1991-2011) of 34 rain gauges stations all over the Bangladesh were collected from Bangladesh Meteorological Department (BMD). Geographical Information System (GIS) tools were used in the present study to interpret the results. The Arc GIS 10.1 software (interpolation tool, Kringing) and different statistical analysis were carried out to get output results of different computational methods. GIS was used to show the patterns of rainfall all over the Bangladesh. The average rainfall of Bangladesh in the year of 1991 were 2876.029 mm, 2654.54 mm and 3066.47 mm by arithmetic average, thiessen polygon and isohyet method respectively whereas, in the year of 2011 the average rainfall by arithmetic average, thiessen polygon and isohyet methods were 2478.76 mm, 2213.046 mm and 2733.63911mm respectively. The annual average rainfall by all these three methods showed a decreasing trend science in 1991 to 2011 by considering all significant level of error in annual average rainfall that may be due to the physiographic stratification of the Bengal delta. The GIS interpolation tool (Kringing) also showed the decreasing patterns of annual average rainfall all over the Bangladesh. All these methods are not suitable to measure rainfall in different regions of the country. So, region-wise rainfall estimation must be done all over the country by these methods to find the actual scenario of rainfall patterns in Bangladesh.
Authors and Affiliations
Md. Ashraful Islam Chowdhury, Mohammad MahbubKabir, Abul Fazal Sayed, Sazzad Hossain
Keywords
Related Articles
- EP ID EP38708
- DOI -
- Views 194
- Downloads 0
Vegetation and land cover change in the National park of EL Kala: Application of ndvi differencing and classification analysis
In this study, vegetation and land cover change were investigated in order to understand the nature and dynamic of changes occurred in the National Park of El-Kala (Algeria) between years 2002 and 2013. Landsat images,...
Environmental risk assessment of sediment and water in Cansaga Bay, Philippines
Physicochemical analysis of Cansaga Bay, Cebu, Philippines was conducted to evaluate bay water and sediment for environmental risks brought by proposed reclamation and development. The main objective was to provide basel...
Studying the effects of improved fuel quality by determining the effects of SO2on people health with using AIRQ method
Low quality fuels and vehicles, and uncontrolled and excessive use of fossil fuels, have created problems such as air pollution that has increased incidence of various diseases. This research studied and compared permis...
Studies on some biochemical markers of Ouled Djellal ewes from semi-arid zone
The purpose of this study was to determine the influence of physiological stages and seasons on some blood markers of Ouled Djellal breed from semi-arid zone of east Algeria. The study was conducted on healthy ewes durin...
Investigation into anthropogenic pressures and assessment of ethnobotanical insights regarding Berberis spp. across traditional landscape of Karakorum Mountain Ranges
Present study was aimed at assessment of anthropogenic pressures and documentation of ethnobotanical wisdom regarding Berberis species in traditional landscape of Karakoram Mountain Ranges. Cultural transformation has...