GIS in Water Resources†††††† Review for Midterm Exam††††††††††††† Fall 2009


The material is classified according to Bloomís Taxonomy of Educational Objectives:


Level†††††††† Title††††††††††††††††††††† Meaning

1††††††††††††††† Knowledge†††††††††† Definitions, facts, formulas

2††††††††††††††† Comprehension†††† Explanation of definitions, formulas, problem solving procedures

3††††††††††††††† Application†††††††††† Know how to use a formula or procedure to solve simple problems

4††††††††††††††† Analysis††††††††††††††† Break down a complex problem and solve by steps

5††††††††††††††† Synthesis†††††††††††††† Derivation of basic formulas, design of new systems

6††††††††††††††† Evaluation†††††††††††† Advantages and limitations of alternative approaches


Session††††††††††† Topic††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††† Level

1††††††††††††††††††††† Introduction to GIS in Water Resources††††††††††††††††††††††††††††††††††††††††††††††††† 2

2††††††††††††††††††††† Introduction to ArcGIS††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††† 2

3††††††††††††††††††††† Exercise 1: Introduction to ArcGIS and HydroExcel††††††††††††††††††††††††††††† 4

4††††††††††††††††††††† Data sources for GIS in water resources††††††††††††††††††††††††††††††††††††††††††††††††† 2

5††††††††††††††††††††† Geodesy, Map Projections and Coordinate Systems††††††††††††††††††††††††††††††† 4

6††††††††††††††††††††† Exercise 2: Building a Base Map for the San Marcos Basin††††††††††††††††††† 4

7††††††††††††††††††††† Spatial analysis using grids†††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††† 4

8††††††††††††††††††††† Exercise 3:Spatial analysis††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††† 5

9††††††††††††††††††††† DEMís and watershed delineation†††††††††††††††††††††††††††††††††††††††††††††††††††††††††† 4

10††††††††††††††††††† Exercise 4: Watershed and stream network delineation†††††††††††††††††††††††††† 5

11††††††††††††††††††† Network analysis, Arc Hydro, and NHDPlus††††††††††††††††††††††††††††††††††††††††† 3

12††††††††††††††††††† Space and time in ArcGIS††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††† 2

13††††††††††††††††††† Exercise 5: Flow networks and basin precipitation††††††††††††††††††††††††††††††††† 5



Expected Skills

         Convert degree, minute, second coordinates to decimal degrees, and vice versa

  • Determine the length of a line along a meridian, parallel or great circle on a spherical earth.
  • Determine the length of a line when using projected coordinates.
  • Sketch on a map the standard parallels, central meridian, and latitude of origin for a given projection (the coordinates of origin, what earth datum, what projection)
  • Determine the map extent of a set of geographic data
  • Determine the statistics (e.g. average value or sum) of an attribute of a selected set of features satisfying a logical query
  • Be able to take the parameters of a map projection and interpret what they mean (focus on geographic, UTM, Albers and State Plane projections)
  • Know the common national data sources for GIS in Water Resources and their GIS data formats (vector, raster, point, line, polygon etc.)
  • Be able to perform raster calculations for spatial analysis and understand the concepts involved with raster calculation
  • Be able to calculate slope on a DEM
  • Take a small grid of elevation cells and calculate the flow direction and flow accumulation grids
  • Define the watershed of a cell in a DEM grid
  • Derive Geomorphologic and Watershed attributes from a DEM derived drainage network.These include, channel length, drainage area, and drainage density.
  • Be able to use interpolation tools to obtain spatial fields from point data and explain the function and interpret the output of these tools.
  • Be able to use zonal statistics tools to obtain averages of spatial fields such as precipitation and slope over watersheds and catchments.Explain the function and interpret the output from these tools.
  • Be able to analyze spatial aspects of the water balance (precipitation, streamflow, and runoff ratios) to develop a spatial understanding of the hydrologic flows in a river basin
  • Understand how geometric networks are created and how catchments and attributes are connected to flowlines in the NHDPlus.
  • Understand how geoprocessing operations can be sequenced through time to create time series of watershed attributes.


Readings from Arc Hydro: GIS in Water Resources



Reference in ďArc HydroĒ

1.Building hydronetworks and connecting features to them

Chapter 3, pp. 34-47

2.DEMís and delineation of watersheds and stream networks

Chapter 4, pp. 55-86

3.Time series and connecting spatial and temporal data

Chapter 7, pp. 146-161