Influence of Climate Variability on Seasonal Rainfall Patterns in South-Western DR Congo

Tshiabukole, Kabongo; Khonde, Pongi; Muliele, Tony M.; Vumilia, Kizungu; Lunekua, Kiasala; Mbuya, K.

doi:10.4236/oalib.1102952

Cited by 6 publications

(6 citation statements)

References 3 publications

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“…The average annual precipitation has declined by 8-12% from 1960 to 1998. Climate change is manifested in DRC by short periods of heavy rainfall leading to multiple flooding events followed by early droughts [49,50]. This considerable fluctuation in the climate regime causing either drought or flooding has an influence on vector abundance and diversity [51].…”

Section: Discussionmentioning

confidence: 99%

Mosquito-borne viral diseases in the Democratic Republic of the Congo: a review

et al. 2020

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Section: Discussionmentioning

confidence: 99%

Mosquito-borne viral diseases in the Democratic Republic of the Congo: a review

et al. 2020

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“…Tshiabukole et al [6] applied SPI to analyze the influence of climatic variability to the seasonal rainfall pattern in Southwestern Congo. They found that the frequency of occurrence of dry periods in successive years is relatively low, although 25 years over the last 50 years have experienced droughts.…”

Section: Discussionmentioning

confidence: 99%

“…In this study, we evaluated the suitability of locations for small reservoirs at the Bodri-Kuto river basin using the monthly SPI [6]. To calculate monthly SPI, we used the average monthly rainfall.…”

Section: Introductionmentioning

confidence: 99%

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Location Suitability for Small Reservoirs at the Bodri-Kuto River Basin Based on Spatial Monthly SPI

Suharyanto

Harjanti²,

Sriyana

et al. 2020

Water

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Despite efforts to develop and conserve water resources, almost every year during the dry season, some areas in Central Java province in Indonesia still experience a lack of water, especially in rural villages. These areas require water supply via water trucks and/or portable pumps to obtain water from rivers and groundwater. The Central Java government committed to implementing a program involving the construction of 1000 small reservoirs by 2020 to overcome water shortages. However, the technically ideal sites are mostly privately owned, which requires lengthy and costly land acquisition. To avoid the uncertainty of land acquisition, some small reservoirs were placed on state-owned land, which did not require land acquisition. The consideration of putting more emphasis on state-owned land rather than technically ideal sites for the construction of small reservoirs raise the issue on the location suitability of those reservoirs. In this study, we evaluated the suitability of the location of small reservoirs in the Bodri-Kuto river basin using the monthly standardized precipitation index (SPI). We used rainfall records of 25 stations in the river basin from 2000 to 2016 and analyzed yearly and monthly rainfall data. The yearly analysis shows that the dry conditions (SPI < −0.5) from 2005 to 2009 affected more than half of the rainfall stations (>50%), whereas the rainfall stations that experienced more dry years included Kedung Wungu, Babadan, Bojong, Ketapang, Sekopek, and Podowaras (more than 9 out of 17 years). The monthly SPI shows that during July, August, and September, all the rainfall stations experience moderately dry or worse conditions (SPI < −0.50). Using 25 rainfall stations, we determined the spatial spread of dry conditions using monthly SPI values from July, August, and September. Overlay of the spatial spread of dry conditions with the location of small reservoirs can be used to evaluate the suitability of small reservoir locations. We found that 1 (3%) location is very suitable, 7 (21%) locations are suitable, 24 (73%) locations are moderately suitable, and 1 (3%) location is less suitable. The findings indicate that the spatial distribution of SPI can be used as an additional criterion for evaluating the suitability of small reservoirs’ locations should technically ideal locations be unavailable.

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“…This index used to examine the nature of the trends to determine the dry and wet years in the record. Tshiabukole et al (2016), used the classification system shown in the standardize anomaly index (SAI) value produced by Mckee, et al, ( 1993) to define drought intensities resulting from the SAI. They also defined the criteria for a drought event for any of the time scales.…”

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confidence: 99%

Analysis of Rainfall Variability for Mekelle Meteorological Station, Northern Ethiopia (1960-2009)

Weldesenbet¹

2019

CER

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Nowadays rainfall variability is threatening the world. Despite this, studies related to the determination of variations, trends and fluctuations of rainfall have little local and regional specificity. Hence, this study aimed to analyze the trend and variability of the annual and seasonal rainfall occurrence at Mekelle Airport meteorological station, Northern Ethiopia. Historical rainfall data for the period 1960-2009 of the rain gauge station were obtained from National Meteorological Service Agency. Annual, seasonal and monthly rainfall trends; onset and cessation date of kiremt rainfall; growing period length and the number of rainy days and dry spell length were considered. Standardize anomaly index (SAI) and coefficient of variance was employed to analyze the rainfall data variability using INSTAT plus, SPSS version 20 and Excel. Analysis of the historical data showed extremely severe drought happened in the area in 1984 which resulted in the death of one million people, 8 million people highly affected, and 2.3 million people food in secured. 1961 was an extremely wet year. Generally, 70%, 18% and 12% years were normal, dry and wet respectively for the last 50 years. High annual, seasonal and monthly rainfall variability was observed. Though the station showed both increasing (1984-1988) and decreasing trends (1961-1968) of annual rainfall totals a declining trend was more pronounced. Besides, one to two weeks variability on the onset and cessation date was observed. The minimum and maximum kiremt season rainy days recorded in 1987 (27days) and 1986 (86 days) respectively while the maximum dry spell days recorded in the 50 years was in 1969. Thus, devising agronomic practices that retain moisture at the plant root zone and reduce crop failure due to variability of rainfall including extended dry spell could be important.

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Influence of Climate Variability on Seasonal Rainfall Patterns in South-Western DR Congo

Cited by 6 publications

References 3 publications

Mosquito-borne viral diseases in the Democratic Republic of the Congo: a review

Mosquito-borne viral diseases in the Democratic Republic of the Congo: a review

Location Suitability for Small Reservoirs at the Bodri-Kuto River Basin Based on Spatial Monthly SPI

Analysis of Rainfall Variability for Mekelle Meteorological Station, Northern Ethiopia (1960-2009)

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