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Change in Riparian Forest of the Inner Valley
Climate Runoff and Channel Widening
Channel Widening and Equilibrium
alluvial annual ﬂood antecedent rainfall Arizona average daily discharge Babocomari River Bahre Betancourt and Turner cause of entrenchment channel and ﬂoodplain channel enlargement channel widening Charleston cienegas climate Colorado Plateau Cooke and Reeves cottonwood deﬁned deposits downstream early eight stations eight weather stations entrenched channel Fairbank ﬁeld ﬁrst ﬁve Fort Huachuca Geological geomorphic geomorphology grazing Hastings and Turner Hereford bridge high-intensity rainfall Holocene inner valley inset June 15—October 15 large ﬂoods large runoff largest ﬂood late Lewis Springs long-term average low-intensity rainfall McCool Ranch mesquite occurred older ﬂoodplain Patagonia Pedro River valley postentrenchment alluvium pre-entrenchment alluvium pre-entrenchment terrace precipitation probably rain rainfall and runoff rainfall intensity riparian forest runoff San Pedro River Santa Cruz River sediment shown in Figure shows signiﬁcant stabilization stream entrenchment study area trenchment tropical cyclones typical University of Arizona upper San Pedro upstream variation vegetation water table wet-season rainfall