1. GIS in Water Resources: Lecture 1 The goal of this class is to learn how to apply geographic information systems in water resources. Hydrologists use many different data sources and GIS provides the capability to integrate them in the analysis of water resources problems

2. Our Classroom Dr David Tarboton Students at Utah State University Dr David Maidment students at UT Austin Dr Wayne Woldt, Dr Ayse Irmak students at University of Nebraska - Lincoln

3. GIS in Action: Hurricane Katrina – 1 year later http://msnbc.msn.com/id/9150429 / Flooding in New Orleans http://www.msnbc.msn.com/id/9130254/ Water mapping where is the water what is in the water? Water movement where is it going? Issues for this course

4. http://lacpr.usace.army.mil/

6. Flooding in New Orleans http://lacpr.usace.army.mil/

7. GIS in Water Resources: Lecture 1 In-class and distance learning Geospatial database of hydrologic features Arc Hydro data model Curved earth and a flat map

8. Six Basic Course Elements Lectures –Powerpoint slides –Video streaming Readings –“Arc Hydro: GIS in Water Resources” Homework –Computer exercises –Hand exercises Term Project –Oral presentation –HTML report Class Interaction –Email –Discussion Examinations –Midterm, final

9. Learning Styles Instructor-Centered Presentation Community-Centered Presentation Student Instructor

10. University Without Walls Traditional Classroom Community Inside and Outside The Classroom

11. Distance Learning Dr David Tarboton Students at Utah State University Dr David Maidment students at UT Austin Other People Other People Dr Wayne Woldt, Dr Ayse Irmak students at University of Nebraska - Lincoln

12. GIS in Water Resources: Lecture 1 In-class and distance learning Geospatial database of hydrologic features Arc Hydro data model Curved earth and a flat map

13. Geographic Data Model Conceptual Model – a set of concepts that describe a subject and allow reasoning about it Mathematical Model – a conceptual model expressed in symbols and equations Data Model – a conceptual model expressed in a data structure (e.g. ascii files, Excel tables, …..) Geographic Data Model – a conceptual model for describing and reasoning about the world expressed in a GIS database

14. Data Model based on Inventory of data layers

15. Spatial Data: Vector format Point Point - a pair of x and y coordinates (x 1,y 1 ) Line Line - a sequence of points Polygon Polygon - a closed set of lines Node vertex Vector data are defined spatially:

16. Themes or Data Layers Vector data: point, line or polygon features

17. Kissimmee watershed, Florida Themes

18. Attributes of a Selected Feature

19. Raster and Vector Data Point Line Polygon VectorRaster Raster data are described by a cell grid, one value per cell Zone of cells

20. http://srtm.usgs.gov/srtmimagegallery/index.html Santa Barbara, California

21. How do we combine these data? Digital Elevation Models Watersheds Streams Waterbodies

22. An integrated raster-vector database

23. GIS in Water Resources: Lecture 1 In-class and distance learning Geospatial database of hydrologic features Arc Hydro data model Curved earth and a flat map

24. GIS in Water Resources Consortium Bringing together these two communities by using a common geospatial data model GIS CRWR Water Resources

25. Data Model Based on Behavior “Follow a drop of water from where it falls on the land, to the stream, and all the way to the ocean.” R.M. Hirsch, USGS

26. Integrating Data Inventory using a Behavioral Model Relationships between objects linked by tracing path of water movement

27. Arc Hydro: GIS for Water Resources Published by ESRI Press The Arc Hydro data model and application tools are in the public domain

28. Arc Hydro — Hydrography

29. Arc Hydro — Hydrology

30. Flow Time Time Series HydrographyHydro Network Channel System Drainage System Arc Hydro Components

31. Hydrologic Information System Analysis, Modeling, Decision Making Arc Hydro Geodatabase A synthesis of geospatial and temporal data supporting hydrologic analysis and modeling

32. “White space” is the Grey at Dobson minus Ahaura, Arnold and Grey at Waipuna

33. Nexrad Radar Rainfall Map

34. Nexrad Map to Flood Map in Model Builder FLO ODP LAIN MAP Flood map as output Nexrad map as input Model for flood flow Model for flood depth HMS

35. GIS in Water Resources: Lecture 1 In-class and distance learning Geospatial database of hydrologic features Arc Hydro data model Curved earth and a flat map

36. Origin of Geographic Coordinates (0,0) Equator Prime Meridian

37. Latitude and Longitude Longitude line (Meridian) N S WE Range: 180ºW - 0º - 180ºE Latitude line (Parallel) N S WE Range: 90ºS - 0º - 90ºN (0ºN, 0ºE) Equator, Prime Meridian

38. Latitude and Longitude in North America 90 W 120 W 60 W 30 N 0 N 60 N Austin: (30°N, 98°W) Logan: (42°N, 112°W)

39. Map Projection Curved Earth Geographic coordinates: , (Latitude & Longitude) Flat Map Cartesian coordinates: x,y (Easting & Northing)

40. Earth to Globe to Map Representative Fraction Globe distance Earth distance = Map Scale: Map Projection: Scale Factor Map distance Globe distance = (e.g. 1:24,000) (e.g. 0.9996)

41. Coordinate Systems (  o, o ) (x o,y o ) X Y Origin A planar coordinate system is defined by a pair of orthogonal (x,y) axes drawn through an origin