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Section 785.19 (d) Continued. <br />• <br />(A) Surface roughness, slope and vegetation of the channel, flood <br />plain, and low terraces that retard the flow of surface waters; <br />(B) Porosity, permeability, water-holding capacity, saturated thickness <br />and volume of aquifers associated with streams, including alluvial <br />aquifers, perched aquifers, and other water bearing zones found beneath <br />valley floors; and <br />(C) Moisture held in soils or the plant growth medium within the <br />alluvial valley floor, and the physical and chemical properties of the <br />subsoil that provide for sustained vegetation growth or cover during <br />extended periods of low precipitation. <br />(iii) Characteristics supporting the function of regulating the flow of <br />water which include, but are not limited to-- <br />• (A) The geometry and physical character of the valley, expressed in <br />terms of the longitudinal profile and slope of the valley and the <br />channel, the cross section, slopes and proportions of the channels, <br />flood plains and low terraces, the nature and stability of the stream <br />banks and the vegetation established in the channels and along the <br />stream banks and flood plains; <br />(B) The nature of surface flows as shown by the frequency and duration <br />of flows of representative magnitude including low flows and floods; and <br />(C) The nature of interchange of water between streams, their associated <br />alluvial aquifers and any bedrock aquifers as shown by the rate and <br />amount of water supplied by the stream to associated alluvial and <br />bedrock aquifers (i.e., recharge) and by the rates and amounts of water <br />supplied by aquifers to the stream (i.e., baseflow); <br />• (iv) Characteristics which make water available and which include, but <br />are not limited to-- <br />785-21 <br />