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<br />Along with the flood waters being discharged into the streams, large <br />amounts of sediment and/or debris are carded to the streams. <br />Sediment erosion is dependent upon severa,l factors tncludingrainfall <br />inte1sity, ground cover, soil type, antecedent moisture and season. The <br />basin can be subdivided into four groups with respect to sediment production. <br />This subdivision in the order of severity is: the badlands; the non- <br />cuHivated uplands; the cultivated lands; and the urbanized areas., Sediment <br />in tile runoff minimizes bank erosion within the gulches and arroyos but also <br />incrl!:lses the damases at road crossings and on flooded plroperties. <br />Debris carried in the channels frequently jams at crossing structures <br />caus'ing overflow, erosion and sometimes structural fail Ul^e. The areas most <br />prOnl! to debris production are those with dense growths of sage, cedar and <br />juniper. <br /> <br />19 <br />