ProblemSet_1_2011 - C&EE 250A Surface Water Hydrology UCLA,...

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1 C&EE 250A – Surface Water Hydrology UCLA, Fall 2011 Problem Set #1 (due Wednesday, October 12, 2011) During this quarter you will each work with a unique data set from a watershed in the United States. Each of you is being assigned a basin from the MOPEX database that has been used extensively in parameter estimation and other studies ( Each of the basin outlets contains a USGS streamgage that records flow data and each gage location is also a National Weather Service River Forecast Center streamflow forecast point (future discharge values are estimated each day at each location). Data sets include streamflow, potential evaporation, temperature, soil classification, vegetation types, model parameters (Noah and SAC-SMA) as well as other miscellaneous data for the period 1948 to 2002. We will use this data throughout the quarter to analyze various components of the water budget as well as watershed properties. For this first assignment, you will evaluate the general behavior and climatology for your assigned basin. We will always work in water years unless otherwise stated. In the northern hemisphere, a water year (WY) starts October 1 st and ends Sept. 30 th ; the designated year is the year that Sept. 30 th falls in (i.e. Oct. 1, 1979 to September 30 th , 1980 is designated as WY 1980). 1. Using the GPS coordinates provided in the basin file, produce a digital image with your stream gage location on a satellite-based terrain. Ideally this should be done using Google Earth, but you may also use Google Maps or other terrain or other mapping software. There must be a map scale, north arrow and some regional reference points (cities, highways, etc.) on the map. Hand-drawn maps will not be accepted. 2. Use the precipitation and streamflow time series from your study watershed perform the following: a. Plot the daily values of precipitation and streamflow for 5 water years (i.e. you will have 5 plots; each with a year’s precipitation and streamflow together on one plot). Discuss the patterns and seasonal trends in your data as well as any observed relationships between precipitation and discharge. Provide some explanation of your observed precipitation and corresponding flow patterns (i.e. When is the maximum discharge? Maximum precipitation? What might be driving these patterns? Is there a lag between precipitation and
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This note was uploaded on 02/02/2012 for the course CEE 250 taught by Professor Terrihogue during the Fall '11 term at UCLA.

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ProblemSet_1_2011 - C&EE 250A Surface Water Hydrology UCLA,...

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