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<br />Hydrology <br /> <br />. What: Flows (CFS) in various points in the <br />mainstem and certain tributaries? <br />. Where: CRE- Lees Ferry, Sixty-mile, Grand <br />Canyon, Diamond Creek, Paria, LCR, and selected <br />lesser tributaries in Marble Canyon <br />. When: Continuous <br />. Methods: Selected Conventional Combined with <br />Surrogate In Situ Monitors and USGS Gauges <br /> <br /> <br />Sediment <br /> <br />. What: <br /> <br />1.ls there any significant change in the trend of sand <br />storage over time? <br />2.What is the effect of natural perturbations on <br />sediment storage? <br />. Where: Lees Ferry, Marble Canyon, below the Lower <br />Colorado River <br />. How often: Fine sediment storage- every 2 years <br /> <br />. Methods: Sand bar area & Volume <br />Mass balance sediment transport determinations <br /> <br /> <br />4 <br />