Structural Control On Ground Water Dynamics In Gur River Catchment Of Jema River Sub-basin At Middle Blue Nile Basin In Central Ethiopia

In Central Ethiopia, The Structural Control On Ground Water Dynamics In Gur River CatchmentrnOf Jema River Sub-Basin At Middle Blue Nile Basin Have Been Investigated To CharacterizernThe Ground Water Flow Direction And Lineaments Orientation.rnThe Development Of Ground Water Contour Map, Lineament Orientation And Flow Direction IsrnBased On The Interpretation Of Water Level Data And From Field Measurement Data Of Attitudern(Strike) Were Plotted On Rose Diagram Respectively. Lineaments Were Extracted From DEMrnUsing Geomatica Software Mapped Using Kriging Interpolation Tools In Arc GIS 10.3. ThernGeological Structure And Regional Fault System From NW-SE Trending Horst Beneath VolcanicrnRock Unit And Ridges Control The Aquifer Distribution In The Catchment. The Lineament Density IsrnHigh On Lithologic Unit Of Sedimentary Rock Unit, But There Are Thin Beds Of Mudstone And ShalernIntercalation With Upper Sandstone Domes Are Affected By Fractures And Faults, They FormrnGroundwater Flow Barriers. The Volcanic Rock Unit Is Highly Fractured And Jointed With MajorrnLineament Orientation N-S, E-W, And NE-SW Direction. In Sedimentary Rock Due To High DeeprnGorge Which Is Strongly Disturbed By Geological Structure With Varying Attitude Act As LowrnPermeability Boundaries. Hence Geological Structure And Attitude Influenced On Ground WaterrnStorage And Dynamics By Hindering or Deflected Ground Flow Direction. Therefore the FracturesrnAnd Joints Act As Conduit Though Which Ground Water Flow or Barrier.

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