Thomas Moore Okrah , J. A. Quaye-Ballard , S. A. Andam-Akorful , Ibrahim Abdul Sulemana (2019). Assessing Spatial and Temporal Precipitation Dynamics in Upper East Region of Ghana Using Chirps Data from 1981 to 2016. International Journal of Geography and Geology, 8(4): 110-127. DOI: 10.18488/journal.10.2019.84.110.127
Precipitation variability evaluation assumes a vital part in water asset administration and rainfed agribusiness. In Ghana, rain gauge stations are poorly distributed and also, obtaining long time span of data is difficult due to data inconsistency, as a result remotely sensed precipitation products are largely used to complement ground gauge stations data for assessing climatic variability and water resource managements. In this study, Climate Hazards Group Infrared Precipitation with Station (CHIRPS) precipitation data from 1981-2016 and also utilizing Cumulative Residual Analysis (CRA), Mann-Kendall, Sen's Slope, Wavelet Transform (WT) and Principal Component Analysis (PCA). Results show that 1981, 1999, 2002 and 2013 were four noteworthy years with changes in precipitation. The Mann-Kendal and Sen's Slope demonstrate that 55.71% of UER indicated diminishing month to month precipitation with 27.34% critical patterns. Precipitation in April, May, and June demonstrated a diminishing pattern while July, August, and September showed an increasing trend during the 35 years’ study period. Further investigation using Continuous Wavelet Transform indicated an annual variation significant. PCA uncovered that the spatial variability of precipitation in UER is extremely assorted, however greater part (33.76%) of the fluctuation is situated in the north-eastern part. Thus, the results from remotely sensed precipitation products an effective, efficient and cheap way of assessing top to the bottom comprehension of precipitation variation at regional level.
This study is one of very few studies which have investigated in the study area which applied new methods such as Cumulative residual analysis (CRA), Mann-Kendall and Sen’s Slope tests, Wavelet transform (WT), Principal component analysis (PCA) on remotely sensed precipitation data to assess both spatial and temporal variability.
2016-2017 Recession: Perspectives of Women's Vulnerability to Cassava Consumption and Cultivation in Nigeria's Sub-Urban Space
Eti-obong Simeon Ema (2019). 2016-2017 Recession: Perspectives of Women's Vulnerability to Cassava Consumption and Cultivation in Nigeria's Sub-Urban Space. International Journal of Geography and Geology, 8(4): 128-136. DOI: 10.18488/journal.10.2019.84.128.136
Women are an important factor of livelihood in every household especially in the African traditional society. As recession stretches their resilience, the perception of women’s vulnerability to cassava consumption and cultivation was revealed in the purposively sampled Epiri Nsukara suburban space of Uyo. A sample size of 384 exposed 81% respondents earn below the minimum wage with a prevailing rising cost of cassava, 75% acknowledged that family income does not encourage savings nor investments as purchase of food Cassava being paramount. Out of the 91% women farmers 63% identified high cost of cassava as their motivation for farming. These women were exposed to limited access to scientifically improved species of the crop stems, fertilizers, disease outbreaks, pest damage, and limited farm space. A community based approach to this emergency response should be carried out where concern institutions and stakeholders provide improved cassava stems, fertilizers and other farm inputs through an easily accessible value chain. Also, subsidies should be granted these farmers to encourage their purchase of these improved species. An active community-agriculture extension agent relationship should be in place to bridge the knowledge gaps that exist for adopting modern models and methods of cassava cultivation to increase cassava yield at a limited possible time.
This study reveals resilience of women to recession in consumption and cultivation of Cassava staple. It contributes to the existing literature on urban farming by revealing on the vulnerabilities and opportunities available to women smallholders, investors and Government in appropriately increasing productivity.
Characterization of Regolith Types and its Impact on Gold Anomaly in Highly Weathered Terrains Using Multiple Dataset
Clement Ntori , Emmanuel Arhin , Ibrahim Abdul Sulemana , D. Y. Antwi Boateng (2019). Characterization of Regolith Types and its Impact on Gold Anomaly in Highly Weathered Terrains Using Multiple Dataset. International Journal of Geography and Geology, 8(4): 137-152. DOI: 10.18488/journal.10.2019.84.137.152
Deposition of post mineralization materials and incessant evolution of regolith materials have resulted in many complex geological environments. These often produce subtle geochemical responses and make geochemical anomaly delineation very difficult. To mitigate the challenge of following ‘false’ anomaly emanating from the regolithic effect, the study mapped the regolith types and used it to explain the geochemical behavior of gold. Multiple dataset such as Aster, radiometric, GDEM were combined with ground truthing and evaluated to characterize the regolith into FRED. This was done alongside the collection of 3252 soil samples. The samples were analyzed for gold using BLEG with AAS finishing. The geochemical data were however interpreted accounting for the regolith. Multiple thresholds were chosen for each regolith using q-q plots. The results showed 24.3% to be depositional regolith and 75.7% was a residual environment consisting of 46% Ferruginous, 40% relict and 4% erosional. Both ferruginous and depositional regimes had capabilities of impacting negatively on gold anomaly. The result further showed that each regolith regime had capabilities of hosting mineralization and recommends that equal weight of importance should be accorded to all regimes. It further proposed that the regolith map should be fully integrated into geochemical data to avoid following ‘false’ anomalies.
This study documents that regolith environments have huge influence on surface gold expressions and anomaly definition. Regolith-based geochemical interpretation is effective to account for each regolithic effect. Each regolith type has equal tendency of hosting realistic anomaly when equal weight of importance is accorded to them.