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and other water bearing zones found beneath valley floors; and <br />(C) Moisture held in soils or the plant growth <br />medium within the alluvial valley floor, and the physical and chemical <br />properties of the subsoil that provide for sustained vegetation growth or <br />cover during extended periods of low precipitation. <br />(iii) Characteristics supporting the function of <br />regulating the flow of water which include, but are not limited to: <br />(A) The geometry and physical character of the <br />valley, expressed in terms of the longitudinal profile and slope of the <br />valley and the channel, the cross section, slopes and proportions of the <br />channels, flood plains and law terraces, the nature and stability of the <br />stream banks and the vegetation established in the channels and along the <br />• stream banks and floor plains; <br />(B) The nature of surface flows as shown by the <br />frequency and duration of flows of representative magnitude including low <br />flows and floods; and <br />(C) The nature of interchange of water between <br />streams, their associated alluvial aquifers and any bedrock aquifers as <br />shown by the rate and amount of water supplied by the stream to <br />associated alluvial and bedrock aquifers (i.e., recharge) and by the <br />rates and amounts of water supplied by aquifers to the stream (i.e., <br />baseflow); and <br />(iv) Characteristics which make water available and which <br />include, but are not limited to, the presence of land forms including <br />• flood plains and terraces suitable for agricultural activities. <br />2.06-30 <br />