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Impact of surface water reservoirs in enhancing groundwater reserves in the highland of Northern Ethiopia, Tigray region Ghent University
An intensive small scale reservoir construction campaign has been carried out by the regional state of Tigray in order to supplement the rain-fed subsistence agriculture in the region. The plan was to construct 500 reservoirs, each of them with a capacity in the order of 1 million m³, in ten years. Today only about 70 reservoirs have been built throughout Tigray. However, most of these micro-dams did not meet the intended goal of supporting ...
Strong effects of occasional drying on subsequent water clarity and cyanobacterial blooms in cool tropical reservoirs KU Leuven
1. In semi-arid regions, the construction of small reservoirs is important in alleviating water shortage, although many have poor water quality with high turbidity and dense blooms of algae and cyanobacteria, and there are large differences in the ecology of such reservoirs. 2. We took advantage of two exceptionally dry years in northern Ethiopia to study the effect of a dry period and the associated fish kills on reservoir ecology and water ...
Limnological and ecological characteristics of tropical highland reservoirs in Tigray, Northern Ethiopia KU Leuven Ghent University
The semi-arid highlands of Northern Ethiopia (Tigray) have numerous small reservoirs that have been created by microdams in an attempt to provide water supply for irrigation and livestock drinking. Although the reservoirs have substantial added value to residents, their use as water resource is jeopardized by eutrophication and a high occurrence of blooms of toxic cyanobacteria. So far, there is no systematic information available on the ...
Using photonic reservoirs as preprocessors for deep neural networks Interuniversity Microelectronics Centre Ghent University Vrije Universiteit Brussel
Artificial neural networks are very time consuming and energy intensive to train, especially when increasing the size of the neural network in an attempt to improve the performance. In this paper, we propose to preprocess the input data of a deep neural network using a reservoir, which has originally been introduced in the framework of reservoir computing. The key idea of this paper is to use such a reservoir to transform the input data into a ...
Characteristics and migration mechanisms of natural gas in tight sandstone reservoirs in the Longfengshan sag, Songliao Basin, China KU Leuven
© 2018 Elsevier B.V. To better understand gas migration and accumulation in tight sandstone reservoirs, we conducted an integrated petrographic and geochemical analysis of hydrocarbon and aqueous fluid inclusions. This analysis was combined with the burial and multistage hydrocarbon charging histories of the reservoir. The variability in the types of hydrocarbon inclusions in the tight sandstone reservoirs can be mapped to identify phase ...
Pore-throat characteristics of tight sandstone reservoirs composed of gravity flow sediments: Yingcheng Formation, Longfengshan sag, China KU Leuven
© 2018 Elsevier B.V. The Lower Cretaceous Yingcheng Formation in the Longfengshan sag (Songliao Basin, China) represents a typical tight sandstone reservoir that hosts large accumulations of hydrocarbons. The lacustrine sandstones mainly reflect gravity flow deposits making up various lithofacies displaying varying degrees of heterogeneity. This study reports on the links among gravity flow type, diagenetic overprinting and pore-throat ...
Development of a fish-based index combining data from different types of fishing gear. A case study of reservoirs in Flanders (Belgium) University of Antwerp
Fish assemblages in reservoirs and lakes are mainly assessed by multiple sampling gear. The challenge exists in how to combine all the data from the different types of gear to develop a fish-based index. In this paper, we describe a novel approach to this challenge in reservoirs in Flanders. The developed approach can also be used for natural lakes in the same eco-region and for any combination of fishing methods. In a first step, we defined a ...