scholarly journals Effect of Different Lining Materials for Reduction of Seepage Loss in Water Harvesting Structures in Ethiopia, A Review

2021 ◽  
Vol 7 (1) ◽  
Keyword(s):  
Water Harvesting ◽  
Seepage Loss ◽  
Water Harvesting Structures

scholarly journals Water balance assessment of Sajnam watershed, Lalitpur (U.P.)

2019 ◽  
Vol 34 (02) ◽  
Author(s):  
R. K. Jaiswal ◽  
T. Thomas ◽  
Jyoti P Patil ◽  
Meeta Gupta ◽  
V. C. Goyal
Keyword(s):  
Water Balance ◽  
Artificial Recharge ◽  
Local Population ◽  
Water Harvesting ◽  
Balance Assessment ◽  
Irrigation Project ◽  
Main River ◽  
Balance Analysis ◽  
Demand Scenario ◽  
Water Harvesting Structures

It is a well-known fact that it is not all possible to avoid droughts, but droughts can be managed to minimise the hardships of the local population. For this purpose, understanding of the supply-demand scenario is of utmost importance to understand the overall hydrology and planning needs of any watershed. It is in this direction, the comprehensive water balance analysis has been performed for the Sajnam watershed in Lalitpur district of Bundelkhand which is susceptible to regular and continuous droughts. The detailed water balance has been carried out after identification of important components and their quantification using the advance tools of Remote Sensing and GIS alongwith standard estimation techniques of individual components. It was observed that the runoff at the outlet of Sajnam basin is influenced by the water storage in the irrigation project located on the main river. The higher surface runoff of 668.53 MCM, 406.17 MCM, 343.46 MCM and 214.00 MCM is generated only during 2013-14, 2008-09, 2012-13 and 2010-11 respectively. During the remaining years, the runoff varied between 89.35 MCM and 209.81 MCM. Efforts can be initiated towards exploring the possibility of more water harvesting structures onthe lower order tributaries as well as artificial recharge measures depending on the hydro-geology of the watershed..

Impacts of micro-basin water harvesting structures in improving vegetative cover in degraded hillslope areas of north-east Ethiopia

2009 ◽  
Vol 31 (2) ◽  
pp. 259 ◽  
Author(s):  
Sisay Demeku Derib ◽  
Tewodros Assefa ◽  
Belete Berhanu ◽  
Gete Zeleke
Keyword(s):  
Survival Rate ◽  
Biomass Production ◽  
Relative Effectiveness ◽  
Water Harvesting ◽  
Tree Seedling ◽  
North East ◽  
Dry Spell ◽  
Entry Points ◽  
Grass Biomass ◽  
Water Harvesting Structures

Water is one of the most important entry points to improve rural livelihoods in drought affected areas of the north-eastern Amhara region in Ethiopia. Various attempts have been made to overcome this problem by making use of different water harvesting structures. However, the choice of structures has been difficult because of a lack of empirical evidence on the relative effectiveness of the different structures. An experiment was conducted from 2002 to 2004 to compare and evaluate three different water harvesting structures (eye-brow basin, half-moon and trench) against the normal seedling plantation practice by farmers (normal pit) as a control. Data on root collar diameter (RCD), diameter at breast height (DBH), height and survival rate of Acacia saligna tree seedlings was collected at 3-month intervals after planting and annual grass biomass production was also measured. Trench and eye-brow basin structures produced 68, 95, 52 and 44% increases in RCD, DBH, height and survival rate, respectively, 15 months after planting compared with the normal pit. Trench structures increased grass biomass by 41.1% compared with normal pits. Eye-brow basins are recommended on hillsides where stone is available while trenchs could be used where stone is scarce. The results indicated that well designed water harvesting micro-basin structures can mitigate the effect of dry spell shocks on tree seedling performance and land cover rehabilitation. They were also very effective in increasing grass biomass production indicating the potential for improving livestock feed on the available barren hillsides.

scholarly journals ANALYTICAL HIERARCHY PROCESS FOR IDENTIFICATION OF SUITABLE WATER HARVESTING SITE IN GEOSPATIAL ENVIRONMENT

2018 ◽  
Vol IV-5 ◽  
pp. 189-196
Author(s):  
B. N. Shashikumar ◽  
V. Garg ◽  
B. R. Nikam
Keyword(s):  
Land Use ◽  
Land Cover ◽  
Water Availability ◽  
Water Harvesting ◽  
Check Dam ◽  
Suitability Analysis ◽  
Site Suitability ◽  
Suitable Site ◽  
Hierarchy Process ◽  
Water Harvesting Structures

<p><strong>Abstract.</strong> Water is the prime requirement for agriculture, domestic uses and industrial production. In India the per capita available of water is decreasing at a higher rate due to impact of climate change and ever-increasing population. Rainwater harvesting is the technique which is being used in effective storing of surface runoff. There are various types of water harvesting structures namely check dam, farm pond, percolation tank, etc. However, identification of potential site for the construction of the particular water harvesting structure is bit difficult as it depends upon numerous parameters such as soil type, slope, water availability, land use and land cover of the site and the surrounding, etc. The guidelines such as Food and Agriculture Organization; Integrated Mission for Sustainable Development are available for selecting suitable site for water harvesting structures. As the site suitability analysis involves multiple parameters for decision making, in the present study, the selection of suitable site for check dam is made through analytical hierarchy process (AHP) in geospatial domain for Hatni watershed, Madhya Pradesh, India. As location for check dam construction is influenced by soil texture, slope of the terrain, land use land cover, stream order and water availability; these parameters were derived from remote sensing data and analysed. The slope and stream network layers were generated from the digital elevation model (DEM). Further, the influence of soil and water availability in identifying the suitable sites was studied through soil texture and curve number. Different parameters influence the site suitability analysis, therefore, in the present study, IMSD guidelines were used to assign weights to each parameter under consideration. The layers were assigned weights by AHP technique based on pairwise comparison. The layers were reclassified according to the weights, then overlay analysis has been done to get the final site suitability map. As remote sensing provides the synoptic coverage of the earth, it has been further utilised to study the impact of water harvesting structure on its surrounding. The land use land cover map of before and after the construction of water harvesting structure was analysed for change in vegetation condition. It was observed that the vegetative cover has increased after implementation of the water conservation measures. It may be concluded that the geospatial technology has immense potential in site suitability studies for water harvesting structures.</p>

Carbon stock changes through dryland rehabilitation: a case study from central Jordan’s agro-pastures

2021 ◽  
Author(s):  
Liam Hall ◽  
Mira Haddad ◽  
Stefan Strohmeier ◽  
Hamzeh Rawashdeh ◽  
Nabeel Bani-Hani ◽  
...  
Keyword(s):  
Land Cover ◽  
Soil Carbon ◽  
Carbon Stock ◽  
Field Experiments ◽  
Carbon Stocks ◽  
Water Harvesting ◽  
Pronounced Increase ◽  
Landscape Modification ◽  
Central Jordan ◽  
Water Harvesting Structures

&lt;p&gt;Land cover, productivity and carbon stocks are among the widely acknowledged indicators of the land&amp;#8217;s degradation and development status. The indicators&amp;#8217; assess-ability, however, differs across global ecosystems and location. Despite the complexity of carbon stocks, soil carbon in particular is receiving increasing attention for its potential in both climate change mitigation and economic growth in developing carbon markets.&amp;#160;&lt;br&gt;The degraded drylands of Jordan have been targeted by multiple investment programs to rehabilitate their arid agro-pastures, including through the application of mechanized micro-water harvesting structures combined with the plantation of native shrub seedlings. Whilst both local and remote land cover and biomass change monitoring indicate variable rehabilitation success, the related carbon stock changes remain largely under-investigated and unclear.&lt;br&gt;An international research consortium designed and implemented a study to investigate the actual and potential future carbon stocks per ecosystem status at an agro-pastoral research site located in central Jordan&amp;#8217;s &amp;#8216;Badia&amp;#8217;, considering both conventionally managed (degraded) and rehabilitated lands. Field experiments conducted by scientists and &amp;#160;local and former tribal community collaborators were combined with carbon modeling using RothC. This enabled the development of multiple scenarios considering both natural and enhanced, or human induced, processes; for example, through landscape modification (mechanized micro-water harvesting), vegetation plantation as well as optional soil amendment through biosolids. Preliminary results suggest that the implementation of water harvesting structures leads to a pronounced increase in soil carbon sequestration when compared to baseline conditions of between 15% and 45% over a 5 year period , with work ongoing to quantify the uncertainties around these results. The selected rehabilitation scenarios match the criteria for vast potential upscaling across global drylands. The study outcomes will eventually support a comprehensive ecosystem services valuation approach with (soil) carbon as an integral factor and moving towards reversing degradation and crediting the dry ecosystem&amp;#8217;s values beyond their marginal agricultural services.&lt;/p&gt;

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