December 2017

Estimating forest above-ground carbon using object-based analysis of very high spatial resolution satellite images

The potentials and limitations of very high spatial resolution images for aboveground carbon (AGC) estimation are unknown and the methods are not developed. This research was designed to develop a method that predicts AGC at the individual tree level using object-based analysis of very high resolution QuickBird satellite images and in situ diameter at breast height (DBH) measurements. This study was based on the fact...

Author(s): T. G. Workie

December 2017

Banana pests and diseases spread to higher altitudes due to increasing temperature over the last 20 years

In this study, we established changes in minimum and maximum temperature over the past 20 years, and how these changes are likely to affect the status of key banana pests and black Sigatoka disease in main banana cropping systems. A survey was conducted at elevations of 1200, 1400, 1600 and 1800 m above sea level in 13 sites previously used in 1992/1993. Mean monthly minimum and maximum temperatures at different...

Author(s): Erima, R., Kubiriba, J., Komutunga, E., Nowakunda, K., Namanya, P., Seruga, R., Nabulya, G., Ahumuza, E. and Tushemereirwe, W. K.

December 2017

Impact of human activities on groundwater vulnerability in hombolo catchment: Dodoma, Tanzania

Groundwater is an important freshwater resource in Tanzania. However, rapid urbanization, informal/unplanned settlements and agricultural intensification in major basins threaten its sustainability. Most groundwater aquifers in the country are not monitored or managed, thus exposing them to potential contamination and overexploitation. This paper is based on a research conducted in the months of February and March,...

Author(s): Massawe, Salustian L., Komakech, Hans C.,  Martz, Lawerence and Ijumba, Jasper N.