PPT-Storm Hydrograph Tutorial

A resource based on an original by David Cuthbertson Storm Hydrographs Storm hydrographs are used to measure a rivers flow and show the change in river discharge over a short period of time after a storm . Reading: Applied Hydrology Sections 8.1, 8.2, 8.4. 2. Flow Routing. Procedure to determine the flow hydrograph at a point on a watershed from a known hydrograph upstream. As the hydrograph travels, it. 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:. 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. . by Seamus Heaney. How many similes / metaphors / personification can you think of to describe a storm?. . Challenge – can you link your examples to the theme of power and conflict? . . Learning . Starter. Key Words Match Up. Recap. Water Balance. Task : . Explain the water budget graph for Athens, Greece.. What implications would there be for water management in the Athens region?. How will infiltration rates differ between an area of dense grassland and an urban area?. Similarities and differences. T. he key theme of both poems is . power. , as it shows the conflict between nature and man, and that nature always wins. Both poems represent the fear of nature, as shown with the mountain in The Prelude and the storm in Storm of the Island. . 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. on streams throughout the USA. Tonia Hack. William Sanford. Department of Geosciences. Colorado State University. Separate hydrograph using 2-component end member mixing. Estimate . baseflow. Compare to analytical methods: fixed interval, sliding interval, local minimum. 2. Flow Routing. Procedure to determine the flow hydrograph at a point on a watershed from a known hydrograph upstream. As the hydrograph travels, it. attenuates . gets delayed. Q. t. Q. t. Q. t. Q. t. 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. 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.