PPT-Unearthing the Unit Hydrograph

Rami Harfouch Surface Water Hydrology University of Texas at Austin April 2010 Peak flows flood applications channels design Rationale method QC i A Hydrograph storage structures design. Residence Time. Mean Water Residence Time (aka: turnover time, age of water leaving a system, exit age, mean transit time, travel time, hydraulic age, flushing time, or kinematic age). T. . = V. . 7.1 Components of a natural hydrograph. The various contributing components of a natural hydrograph are shown in figure 7.1. To begin with there is baseflow only; that is, the groundwater con­tribution from the aquifers bordering the river, which go on discharging more and more slowly with time. The hydrograph of baseflow is near to an exponen­tial curve and the quantity at any time is represented very nearly by:. or,. Digging into RDA. MOUG RDA Lightning Talks. February 26, 2013. Kevin . Kishimoto. , University of Chicago. Unearthing,. or,. Digging into RDA. The dreaded item. WRITT-. EN +. NARR-. ATED. BY. ALAN. Colonial Heritage:. Creating a Digital Collection from . Hidden and Fragile Resources. Florida Trust for Historic Preservation . Annual Conference. St. Augustine, Florida. May 17, 2013. http://ufdc.ufl.edu/USACH. Reading: Sections 7.1-7.3, 7.5, 7.7, . Hydrologic Analysis. Change in storage w.r.t. time = inflow - outflow. In the case of a linear reservoir, . S = kQ. Transfer function for a linear system (S = kQ).. 1.With . the help of a neat sketch, explain the various component parts of single peaked storm hydrograph. .. 2. Explain . with the help of sketches, the three methods of base line separation. .. 3. Derive . Learning objectives. Be able to use stationary linear response methods (unit hydrograph) to calculate catchment response. Be able to estimate the unit hydrograph from data . Be able to describe the assumptions, limitations and uses of linear response methods . From Mays, 2011, Ground and Surface Water Hydrology. See tabulated values in Mays Table 8.8.1. Example. A watershed has 40% residential (1/4 ac lots), 25% open space (good condition), 20% commercial and business (85% impervious) and 15% industrial (72% impervious) with corresponding soil groups of C, D, C and D. . CE 365K Hydraulic Engineering Design. Spring . 2016. Watersheds upstream of Dam 6. Subbasin. BUT_060. Flow along the longest path. Sheet Flow. Shallow Flow. Channel . Flow.  . Sum travel times over each segment. Bucket. Recording gage. Collector and Funnel. Bucket and Recorder. Accurate to .01 ft. Telemetry- computer. From . Bedient. Interpretation of storm rainfall records. From Mays, 2011, Ground and Surface Water Hydrology. Hydroclimatology. (. Multiscale. Hydrology). A science dealing with the properties, distribution and circulation of water.. R. . Balaji. balajir@colorado.edu. CVEN5333 . http://civil.colorado.edu/~balajir/CVEN5333. Hydrologic Analysis. Change in storage w.r.t. time = inflow - outflow. In the case of a linear reservoir, . S = kQ. Transfer function for a linear system (S = kQ).. Proportionality and superposition. From Mays, 2011, Ground and Surface Water Hydrology. A D hour unit hydrograph is the characteristic response of a given watershed to a unit volume (e.g. 1 in or cm) of effective water input (usually rain) applied at a constant rate for D hours. HYDROGRAPHS. A hydrograph is a continuous graph showing the properties of stream flow with respect to time. Normally obtained by means of a continuous strip recorder that indicates stage versus time (stage hydrograph) and is then transformed to discharge hydrograph by use of rating curve..