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Within this basin is the highest point in Brown County which is located near Ash Ridge ( elevation of 1091 feet ) . The rate of flow increases as the slope ( elevation difference ) between the two sections increases . However , the low sun angle ( elevation of the sun above the horizon ) means that even minor topographic features , such as low hills , can cause major differences in climate at the local level by shading . Additional potential recharge indicators were identified : ( 1 ) topography ( elevation ) , ( 2 ) slope aspect , ( 3 ) parent material ( rock and soil permeability ) , and ( 4 ) vegetation zones .