scholarly journals Effect of small water retention structures on diffusive CO2 and CH4 emissions along a highly impounded river

Inland Waters ◽  
2018 ◽  
Vol 8 (4) ◽  
pp. 449-460 ◽  
Author(s):  
Lluís Gómez-Gener ◽  
Marina Gubau ◽  
Daniel von Schiller ◽  
Rafael Marcé ◽  
Biel Obrador
Keyword(s):  
Water Retention ◽  
Ch4 Emissions ◽  
Small Water ◽  
Retention Structures

State and Performance of Water Retention Structures of Earthen Irrigation Dams in Northern Ghana

2018 ◽  
Vol 1 (1) ◽  
pp. 34-43
Author(s):  
T. A. Adongo ◽  
F. K. Abagale ◽  
G. Kranjac-Berisavljevic
Keyword(s):  
Field Observation ◽  
Water Retention ◽  
Structural Defects ◽  
Northern Ghana ◽  
Key Informants ◽  
Storage Reservoirs ◽  
State Of Water ◽  
Northern Regions ◽  
And Performance ◽  
Retention Structures

The study assessed performance and state of water retention infrastructure of eight (8) irrigation schemes in three (3) northern regions of Ghana. Data was collected using field observation and key informants’ interviews. The results indicated that the Tono and Bontanga earthen irrigation dams’ embankments had no structural defects whereas the embankments of Libga, Golinga, Karni, Vea, Doba and Sankana had some structural defects. Except Libga, all the spillways had no structural deficiencies and signs of risk of failure. All the reservoirs contained some amounts of sediments and weeds. The night storage reservoirs at Tono and Vea were weedy and silted up. The developed irrigable areas of Vea, Tono, Doba, Sankana and Karni schemes had average irrigation rates ranging from 12 - 76 % for the years 2010 - 2017. The water retention infrastructure of the irrigation schemes are recommended for maintenance and periodic repairs to ensure sustainable water retention and availability for crop irrigation.

scholarly journals Natural conditions for the reconstruction of fish ponds and possibilities of their use in ecotourism

2010 ◽  
Vol 14 (1) ◽  
pp. 37-47
Author(s):  
Bożena Prajs ◽  
Maciej Rogalski ◽  
Zofia Sotek ◽  
Małgorzata Stasińska
Keyword(s):  
Environmental Impact ◽  
Water Retention ◽  
Fish Farming ◽  
Favourable Effect ◽  
Fish Ponds ◽  
Natural Conditions ◽  
Small Water ◽  
River Damming ◽  
Water Eutrophication ◽  
Excessive Water

Natural conditions for the reconstruction of fish ponds and possibilities of their use in ecotourism The paper comprises an analysis of the environmental impact of restoring small water retention in the Świergotka River. Hampering water flow due to river damming by 0.5 m and reconstruction of ponds will have a favourable effect on the valley's nature but may result in excessive water eutrophication in case of using these reservoirs for fish-farming.

scholarly journals The analysis of the impact of small retention on water resources in the catchment/ Analiza oddziaływania małej retencji na zasoby wodne zlewni

2014 ◽  
Vol 23 (1) ◽  
pp. 41-51 ◽  
Author(s):  
Waldemar Mioduszewski ◽  
Erik P. Querner ◽  
Zbigniew Kowalewski
Keyword(s):  
Surface Water ◽  
Water Retention ◽  
River Basins ◽  
Simulation Modelling ◽  
Small River ◽  
Water Reservoirs ◽  
Small Water ◽  
River Valleys ◽  
The Impact ◽  
Surface And Groundwater

Abstract The aim of this study was to analyse the impact of selected small water retention measures on surface and groundwater level in river basins. The study was limited to the analysis of measures like small water reservoirs, restoration of bogs and reconstruction of drainage systems in the river valleys. A few study cases were described. Dutch SIMGRO numerical model describing the regional surface water and groundwater flow has been used for simulation modelling of different cases. The result of the study has shown that small retention measures are a good and effective method to increase the ability to retain water in the small river basins. Construction of small water reservoirs and weirs on ditches and creeks and restoration of drained bogs can limit the fast outflow of precipitation and melting water from the catchment. The study has proved that the small water retention measures can be helpful for flood protection and in decreasing of drought threats in small river basins.

scholarly journals Splash dams in the Krkonoše Mts: from the history to their possible use

Geografie ◽  
2020 ◽  
Vol 125 (3) ◽  
pp. 291-317
Author(s):  
Eva Šádková ◽  
Bohumír Janský
Keyword(s):  
Sixteenth Century ◽  
Water Retention ◽  
Water Retention Capacity ◽  
Historical Records ◽  
Water Reservoirs ◽  
Historical Sources ◽  
Retention Capacity ◽  
Small Water ◽  
Old Maps ◽  
Runoff Variability

This paper summarizes findings from historical sources and literature dealing with the small water reservoirs (splash dams) in the Krkonoše (Giant) Mts. Based on old maps and historical records in archives and regional museums, this study describes the original causes and period of origin of the splash dams, and deals with their function and their location in the field. Additionally, this paper focuses on the mechanism of log driving in this area to fully understand the entire organized procedure. Up to twenty-four splash dams, built in the Krkonoše Mts mainly in the second half of the sixteenth century, were traced in historical records. At the end, there were given examples of some localities in relation to the possible idea of the restoration of some former small water reservoirs with an effort to gradually increase water retention capacity, and reduce runoff variability in headstream areas.

scholarly journals Ground beetles (Coleoptera; Carabidae) as an indicator of ongoing changes in forest habitats due to increased water retention

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e9815
Author(s):  
Emilia Ludwiczak ◽  
Mariusz Nietupski ◽  
Agnieszka Kosewska
Keyword(s):  
Water Retention ◽  
Ground Beetles ◽  
Carabid Beetles ◽  
Small Water ◽  
North East ◽  
The North ◽  
Highly Sensitive ◽  
Beetle Assemblages ◽  
The Impact

This study, concerning the epigeic fauna of carabid beetles (Coleoptera; Carabidae), was conducted in the north-east of Poland, in an area which is part of the Dąbrówka Forest Subdistrict and has been included in the “Small water retention program for the Province of Warmia and Mazury in 2006–2015”. The purpose of the study was to assess the impact of the water retention implemented within the framework of the above program on assemblages of ground beetles. These insects are highly sensitive to any anthropogenically induced transformations. This analysis was based on the interactions among the analyzed insects caused by changes occurring in their habitat. During the 3-year study, 5,807 specimens representing 84 species were captured. The water storage had a significant influence on the structure of the Carabidae assemblages. Before the earthworks were constructed for the project, the beetle assemblages had comprised a large group of xerophilous species, whereas after the small retention reservoirs had been created, an increase in the contribution of hygrophilous species was noticed. The results indicate that the retention works cause alterations in the water and environmental conditions of the habitats, and thereby effect changes in the composition of Carabidae assemblages. Moreover, modification in water relations within a habitat causes long-term changes in the structural and functional diversity of the beetles.

scholarly journals Technical solutions for water damming structures in forest streams

2009 ◽  
Vol 13a (1) ◽  
pp. 263-272
Author(s):  
Waldemar Mioduszewski
Keyword(s):  
Water Retention ◽  
Agricultural Landscape ◽  
Aquatic Organisms ◽  
Destructive Effect ◽  
Natural Landscape ◽  
Small Water ◽  
Small Streams ◽  
Forest Streams ◽  
Security Regulations ◽  
Technical Solutions

Technical solutions for water damming structures in forest streams Small dams are basic elements of water retention systems in agricultural landscape and in forest ecosystems. Despite small water raising and location across small streams, these constructions should conform to security regulations and be resistant to destructive effect of flowing water. Moreover, they shouldn't be a strange element to the natural landscape of the river valley or forest ecosystem. Attention is also focussed in this paper on providing unobstructed flow in natural and artificial streams and on the possibility of migration for aquatic organisms. Examples of dams that do not hamper fish migration are given.

Predikce potenciálních míst k výstavbě retenčních nádrží v krajině na základě využití reliktů zaniklých vodohospodářských staveb

2021 ◽  
Author(s):  
Jana Mazáčková ◽  
Petr Žaža ◽  
Andrej Púčať
Keyword(s):  
Water Retention ◽  
State Legislature ◽  
Cultural Value ◽  
Future Generations ◽  
Special Focus ◽  
Dam Construction ◽  
Small Water ◽  
Building Process ◽  
Historic Landscape ◽  
Construction Works

This certified methodology shows the steps to be taken by contractors and builders of small water reservoirs with a special focus on preserving and archiving cultural value of historic landscape and its evolution. The methodology describes how to find and use defunct relics of historical waterdams in modern constructions (water retention dams), from identification in the landscape, through incorporation into the project documentation of the dam construction, to basic protection during the building process itself. State legislature on historic landscape is also mentioned. Re-utilisation of historic waterdams allows for their conservation for future generations and points at features of the historic dams at risk of destruction, and which need archaeological attention during the construction works (especially the historical drainage outlet). This methodology is praxis driven, as it is actively using knowledge gained through close co-operation with contractors and builders, and reflects their needs during construction.

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