To find out SPI value; 3-month rainfall data of pre-kharif season, 4-month data of Rabi season and 5-month data of season were analyzed through R programing software. Analyzed data of meteorological drought of Pre-Kharif season showed that one-year extreme drought was occurred in Jessore and Patuakhali station; whereas the highest number of severe drought was found in Satkhira and two years extreme drought was found in Chuadanga, Khepupara, Khulna, Maijdi Court and Mongla stations. Department of Meteorology and Hydrology (Myanmar) All drought affected areas were experienced by moderate, severe and extreme droughts in several years during the study period in three seasons. Among these 34 stations, only two stations, Sylhet and Srimangal, observe rainfall in the northeastern zone which lies in the Meghna basin. DataApp; On Line Data Purchase; Jobs; Result; Headquarter & Other Stations; About Us. ), and for each month of the year. Monsoon rainfall of Dhaka. Dew-Drop Vol.2 No.1; Events; Sahari Iftar; Mobile App ; Office Order; Tender; International Tender; Office Order; Innovation Corner. On the ther hand, Feni and Teknaf stations were found highest two years of extreme drought in Kharif season where Feni was also faced three years severe droughts; Kutubdia and Rangamati were faced four years moderate droughts and Teknaf faced sixteen years normal droughts. Again, from the spatial variation of meteorological drought in Kharif season (Figure 7), it is seen that the severe and moderate drought events were occurred in few parts of northern region, south-western region, central region and eastern region in 1981, which was 31% of total area. On the other hand, highest eighteen years normal drought in Jessore and seventeen years normal drought was happened in Khulna and Patuakhali station. After that, obtained SPI value was classified according to the drought classification of World Meteorological Organization (Table 1). Table 1: Standardized Precipitation Index (SPI) values. A crop faces many biotic and abiotic stresses during their growing period. DOI: 10.4172/2157-7617.1000457. Variations of drought areas were also plotted and investigated by different seasons (Pre-Kharif, Kharif and Rabi) of Bangladesh. Content of this site is available under  Creative Commons Attribution 4.0 License Copyright © Rainfall prediction is very important for the Bangladesh economy and day to day life. The cumulative probability is given by: Letting, this equation becomes the incomplete gamma function: Since the gamma function is undefined for x=0 and a precipitation distribution may contain zeros, the cumulative probability becomes: H (x) = q + (1− q)G(x) [22] states that q can be estimated by q = m / n , where q is the probability of a zero. Geographic Information System (GIS) has been used for mapping of spatial extent of meteorological drought from point data. Study areas are located in a tropical monsoon climate characterized by marked seasonal variations. Annual total rainfall in Khulna was increasing by 4.960 mm/year with its total rainfall 1630 mm and coefficient of determination was 0.050. IMD is headquartered in Delhi and operates hundreds of observation stations across India and Antarctica. It is mainly focused on the development of models for long term rainfall prediction of Bangladesh divisions and districts (Weather Stations). In Rabi season, about 50% of total area was affected by severe and moderate droughts in 1985 and mostly affected area were some part of northern, southern-western, central and eastern regions. The dry periods of most of the stations were ranges from 45% to 55% (Table 2). The base data for this work has been collected from Bangladesh Meteorological Department. The BMD observation network density is low, in some cases observation sites are located about 25km apart, whereas theseare about 145kmapartinsomeothersareas (Figure 1).Anumberofgrids It is the principal agency responsible for meteorological observations, weather forecasting and seismology. Heavy Rainfall Warning; Agromet. The most significant increasing trend of drought was found in Rabi season with a rate of 8.66% per 10 years and Pre-Kharif season with a rate of 2.57% per 10 years. Major finding of this study was Pre-Kharif and Rabi season were the most vulnerable to meteorological drought that indicates high seasonal rainfall anomaly in most of the regions of Bangladesh. On the other hand, two extreme droughts in Rajshahi, three severe droughts in Dinajpur, fifteen normal droughts in Bogra and five moderate droughts in Bogra and Ishurdi were prevailed during Kharif season. Go to resource. Then standardized precipitation index is calculated by: Conceptually, the SPI represents a z-score, or the number of standard deviations above or below that an event is from the mean. The base data for this work has been collected from Bangladesh Meteorological Department. According to the data of Kharif season, two years extreme drought in Khulna, two years severe drought was in Bhola, Jessore, Khepupara, Maijdi Court and Patuakhali. The summers here have a good deal of rainfall, while the winters have very little. Heavy Rainfall Warning (No.02/2020) Open Access Journals gaining more Readers and Citations, Meteorological Drought Index Mapping in Bangladesh Using Standardized Precipitation Index during 1981–2010, Advances in Meteorology, Application of standardized precipitation index to assess meteorological drought in Bangladesh. pp: 233-236, On the observed variability of monsoon droughts over India. In 2001, a total of 5,590 millimetres (220 in) was recorded. During Kharif season the highest oneyear extreme drought in Comilla, Dhaka and Madaripur; severe three year’s drought in Faridpur and Mymensingh; moderate five years drought was occured in Comilla. Climate Change; Meteorology; Acid Deposition ; Articles; Environmental Affairs; Remote Sensing and GIS; Contact Us (4.12.2020) According to the observations at (12:30) hrs M.S.T today, the … Unusually heavy monsoon rainfall and flooding is affecting India and neighbouring South Asian countries, as well as China and Japan. Outline of presentation 1)About BMD 2)Present forecasting status. Team; Annual Work Plan; Meeting; NIS. collected from Bangladesh Meteorological Department (BMD). In the present study SPI has been used to observe the drought event of Prekharif, Kharif and Rabi seasons from the year 1980 to 2015. List of Scientist; List of Engineers; AWS Data; WB Project. The average temperature in Dhaka is 25.9 °C | 78.6 °F. DataApp; On Line Data Purchase; Jobs; Result; Headquarter & Other Stations; About Us. Descriptive statistics of number of drought years, percentage of dry and wet periods of Pre-Kharif, Kharif and Rabi seasons of the study periods has been presented in the Table 2. ... served from datalibrary.bmd.gov.bd. **Maritime Ports have been advised to hoist Local Cautionary Signal No. Eastern region shows decreasing trend with a rate of 2.19% per 10 years. Spatial distributions of meteorological drought in Bangladesh. "NOUL" will be moved to the west and then... Department of Meteorology and Hydrology (Myanmar), Condition of La Nina during Winter Season, 2017-2018, Early/ Mid/ Late/ Winter Monsoon Weather Forecast, Early/ Mid/ Late/ Winter Monsoon Water Level Forecast, City Weather Forecast for States and Regions (29.11.2020), Condition of La Nina during Winter Season, 2017, Agro-Met Bulletin for 2nd Dekad of November, 2018. Int J Mod Eng Res 3: 2407–2411, Trends in meteorological and agricultural droughts in Iran. Unusual rainfall … Field Value; Modified Date: 2018-05-10. Weather is generally fair over the Andaman sea and North Bay and a few cloud to partly cloudy elsewhere over the Bay of Bengal. List of Scientist; List of Engineers; AWS Data; WB Project. taf vghs 090500z 0906/1012 35005kt 2000br sct012 becmg 0914/0916 36005kt 1000br sct010 tempo 0923/1003 00000kt 0500fg bkn005 becmg 1004/1006 34005kt 1500br sct012= Drought has a great impact on the agricultural production of Bangladesh. Dew-Drop. Climate Report; Report on Roanu; Report on MORA; Newsletter. WMO Technical Note Number 81, Secretariat of the World Meteorological Organization, Geneva, Switzerland. Rainfall prediction is very important for the Bangladesh … The average temperature in Dhaka is 25.9 °C | 78.6 °F. The resulting parameters are then used to find the cumulative probability of an observed precipitation event for the given month and time scale for the station in question. DataApp; On Line Data Purchase; Jobs; Result; Headquarter & Other Stations; About Us. Among the many abiotic stresses drought was more prominent in northern and south-western regions of Bangladesh compared to the other parts of the country [3]. Daily Rainfall Data 1007. Evaluation of meteorological drought of Pre-Kharif season, it is possible to explain that two years extreme drought in Dinajpur, three years severe drought in Bogra, five years moderate drought in Ishurdi, fourteen years normal drought was occurred in Rajshahi and Ishurdi (Table 2). Figures 1-3 presented the changes and linear trends of drought areas (SPEI ≤ 1) from 1980 to 2015 over three cropping seasons (Pre- Kharif, Kharif and Rabi) of different regions of Bangladesh. The climate is tropical in Dhaka. Regional offices are at Chennai, Mumbai, Kolkata, Nagpur, … Amphan.png. Where, α>0 (α is a shape parameter), β>0 (β is a scale parameter), x>0 (x is the precipitation amount) and is the gamma function). Preprints, Eight Conferences on Applied Climatology. Analyses have been done for two annual maximum data series. In a year, the rainfall is 2022 mm | 79.6 inch. On the other hand, the north-western region was the most vulnerable region of the country [4] which experienced most severe drought because of high variability in rainfall [5]. DataApp; On Line Data Purchase; Jobs; Result; Headquarter & Other Stations; About Us. Daily Rainfall Data . Accepted Date: Mar 23, 2018 / Figure 5: Spatial distributions of meteorological drought in 1995, 2008, 2012 and 2014 of Pre-Kharif season. Also, in Rabi season, the highest increasing rate of droughts areas were found in eastern region (11.11%) followed by northern region (8.22%), southern and western region (7.56%) and central region (6.79%) per 10 years (Figure 4). Bangladesh BMD monthly rainfall Bangladesh BMD monthly rainfall: Bangladesh Meteorological Department. Figure 2: Percentage of drought area in Pre-Kharif season over different regions of Bangladesh (a) Central Region (CR), (b) Eastern Region (ER), (c) Southern and Western Region (SWR) and (d) Northern Region (NR). Copyright: © 2018 Al-Mamun A, et al. In 2014, drought shifted to central and eastern region and affected about 57% of the study area by severe and moderate drought conditions. IJCCSM 4,1 66 Received 6 November 2010 Revised 9 April 2011 ... 3.2 Monthly rainfall simulation over Bangladesh Surface area average rainfall data collected by BMD have been used for the comparison with model simulated rainfall. Drought is nothing but a natural disaster which prevails due to scarcity of water or moisture. From the study period, it was found that all drought affected areas were experienced by moderate, severe and extreme droughts in several years of three seasons. Precipitation in Bangladesh averaged 202.39 mm from 1901 until 2015, reaching an all time high of 1005.33 mm in September of 1934 and a record low of 0.01 mm in December of 1993. Cyclone; Hydrological Disaster. And the percentage of dry period was 60% in Chandpur and 55.56% in Madaripur and Mymensingh (Table 2). Thesis, Department of WRE, BUET, Dhaka, Drought risk assessment in the western part of Bangladesh. The drought index of the study area was calculated in three different cropping seasons namely Pre-Kharif, Kharif and Rabi. The Köppen-Geiger climate classification is Aw. The following is the Monsoon rainfall in Islamabad since 2006 based on the data from Pakistan Meteorological Department. Figure 4: Percentage of drought area in Rabi season over different regions of Bangladesh (a) Central Region (CR), (b) Eastern Region (ER), (c) Southern and Western Region (SWR) and (d) Northern Region (NR). Bangladesh Meteorological Department Home; Service. The Köppen-Geiger climate classification is Aw. Outdoor rainfall, temperature and relative humidity data of the study areas, from January’ 2011 to February’ 2012 were collected from the local stations of the meteorological department of Bangladesh. Also, some researchers [18-21] used the SPI and other indexes to evaluate the spatial and temporal drought characteristics in various regions across the world. Publish Date: 10 July 2020. Bangladesh Meteorological Department Home; Service. List of Scientist; List of Engineers; AWS Data; WB Project. Scarcity or heavy - both rainfall effects rural and urban life to a great extent with the changing pattern of the climate. Bangladesh Meteorological Department (BMD) provides the climate data under the following terms and conditions: Please read and understand these Terms and Conditions and abide by them when you buy data. Published Date: Mar 27, 2018. The cumulative probability, H(x), is then transformed to the standard normal random variable Z with mean zero and variance of one, which is the value of the SPI. To develop map and the spatial extents of drought hazards in different time steps, a study was carried out by Shamsuddin and Behrawan [9] using Standardized precipitation index [10,11] method. The highest rainfall of 620 millimetres (24 in) was recorded in Islamabad during 24 hours on 23 July 2001. Many other researchers [13-17] have applied SPI to analyze the drought characteristics in various parts of India. And highest drought year in Rabi season were 1985, 1986, 2005, 2006, 2009, 2010 and 2012. Theor Appl Climatol 119: 679–688, Some methods of climatological analysis. The highest percentage (47.22%) of dry period was found in Bogra whereas 44.44% was found in Rajshahi and Rangpur. Engg. In Kharif season, the trend of drought area was found increasing in northern region with a rate of 2.63% per decade where central region, eastern region and southern and western region were decreasing with a rate of 1.06%, 3.02% and 3.02% per decade, respectively. To analyze the variations of the drought areas, linear regression methods were used to detect the changing trend of the annual percentage of drought area at different significance levels for the different regions of Bangladesh. Time series of annual drought percentage of area for all study station of Bangladesh (and various regions within) were calculated based on the ratio of the number of stations with SPI ≤ 1.0 to the related total number of study stations or the regions [25]. In case of Rabi season, highest two years extreme drought was in Mongla and four years severe drought was found in Bhola. Earth Interact 16: 1–27, Monitoring meteorological and agricultural drought dynamics in Barind region Bangladesh using standard precipitation index and Markov chain model. It is mainly focused on the development of models for long term rainfall prediction of Bangladesh divisions and districts (Weather Stations). Meteorological drought assessment of eastern region. The most significant increasing trend of drought area was found in Rabi season and decreasing trend was found in Kharif season. Rainfall prediction is very important for the Bangladesh economy and day to day life. Morning Humidity : 92% Evening Humidity : 43% Surface Pressure : 1014.3 hPa The highest percentage of dry period were found in Ishurdi (55.56%) followed by Syedpur (52%), Rajshahi and Bogra (50%) in Pre- Kharif season. Some areas of southern and western regions, central regions, eastern regions and most of the northern region were more vulnerable to meteorological drought. Because of the country's location in the tropical monsoon region, the amount of rainfall is very high. Meteorol Appl 19: 256–264, Performance of drought indices for ecological, agricultural, and hydrological applications. Meteorological drought assessment of central region. From these three seasons the highest percentage of dry period was found in Pre-Kharif season. Drought years, which were defined as years with drought percentage more than 40% [26] showed different variation patterns in different regions. In Pre-Kharif season, Sitakunda faced the highest two years extreme drought, Sylhet, Cox’s Bazar and Teknaf faced four years severe droughts, Kutubdia confronted highest six years moderate droughts and Sitakunda faced sixteen years normal droughts of total drought years. Our Group organises 3000+ Global Conferenceseries Events every year across USA, Europe & Asia with support from 1000 more scientific Societies and Publishes 700+ Open Access Journals which contains over 50000 eminent personalities, reputed scientists as editorial board members. The Standardized Precipitation Index (SPI) was computed in three different cropping seasons namely, Pre-Kharif, Kharif and Rabi based on the monthly precipitation data of thirty-five meteorological stations over Bangladesh during the period 1980–2015. This has caused major disruption, displacement and loss of life, and once again highlighted the importance of national meteorological and hydrological services in protecting public safety. The meteorological information of Chandpur, Comilla, Dhaka, Faridpur, Madaripur, Mymensingh and Tangail stations were evaluated to assess the meteorological drought of central region. However, there is a distinct seasonal pattern in the annual cycle of rainfall, which is much more pronounced than the annual cycle of temperature. The SPI value for 3-months, 4-months and 5-months’ time scales have been calculated from 1980 to 2015 for 35 meteorological stations. Dataset Info These fields are compatible with DCAT, an RDF vocabulary designed to facilitate interoperability between data catalogs published on the Web. In Rabi season, three years extreme droughts occurred in Feni; four years severe droughts in Cox’s Bazar, Rangamati, Sitakunda and Srimangal; nine years moderate droughts in Sandwip and seventeen years normal droughts in Sylhet during study period. Table 2: Descriptive statistics of number of drought years and percentage of dry and wet periods of Pre-Kharif, Kharif and Rabi seasons during 1980-2015. The nature of the SPI allows an analyst to determine the rarity of a drought or an anomalously wet event at a particular time scale for any location in the world that has a precipitation record. Extreme, severe and moderate drought events were found about 68% of the total area of Bangladesh in 1994. J Earth Sci Clim Change 9: 457. Rainfall The single most dominant element of the climate of Bangladesh is the rainfall. 3)Climatological Summery of Bangladesh 4)Impact of climate change in Bangladesh 5)Description of winter 6)Rainfall analysis 7)Temperature analysis 8)Prediction. Whereas five years moderate drought was appeared in Satkhira. The summers here have a good deal of rainfall, while the winters have very little. BMD Service Users List; Organogram; Contact Us . • The meteorological activities started in this country in 1877 through the establishment of one observatory in Satkhira … Monthly precipitation data of 35 meteorological stations were taken from Bangladesh Meteorological Department for a maximum period of 36 years from 1980 to 2015. Thorn [22] uses tables of the incomplete gamma function to determine the cumulative probability G(x) [10] use an analytic method along with suggested software code from Press et al. In Pre-Kharif season, moderate, severe and extreme drought events were occurred about 41% of total area in 1995 and affected northern, south-western and few eastern regions which covered by Rajshahi, Dinajpur, Rangpur, Bogra, Jessore, Chuandanga, Sylhet, Bhola and its neighborhood areas (Figure 6). Citation: Cambridge University Press, Cambridge, England, UK. About 34% of total areas in south-western and eastern regions were affected by meteorological drought in 2008 with the neighborhood areas; Patuakhali, Bhola, Mongla, Noakhali, Chandpur, Comilla, Chittagong Rangamati Cox’s Bazar. Therefore, it is indispensable duty to us to take proper crop managements against extreme conditions of meteorological droughts to increase the crop yield. In general drought is classified as meteorological, agricultural and hydrological droughts which are differing from one another by depending on intensity, duration and spatial coverage [1]. List of Scientist; List of Engineers; AWS Data; WB Project. Data Views (12.12.2020)  Weather is generally fair over the Andaman sea and North Bay and a few cloud to partly cloudy elsewhere over the Bay of Bengal. Bangladesh Meteorological Department Home; Service. Spatial analysis (surface interpolation by ordinary krigging) with these point data were done by the ArcGIS10. 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