Teaching Notes
Example Output
Example My World GISTM map, showing Catalina watersheds overlaid on an elevation map.
Grade Level
Learning Goals
After completing this chapter, students will be able to:
- describe the physical boundaries and processes that define watersheds;
- identify the characteristic pattern of storm development in the Southwest during the North American Monsoon;
- discover what is considered a "normal" response of streamflow to monsoon rainfall in a semi-arid watershed in the southwestern U.S; and
- visualize and manipulate spatial data using basic GIS functions and Google Earth.
Background Information
Wild fires are a natural and essential part of the evolutionary progression of a forest and watershed. They can help clean up undergrowth and provide nutrients to the soil, repel non-native trees and other plant species, and improve grazing for livestock by encouraging the growth of natural grasses. However, historic fire suppression and consequent fuel build-up during the last century have resulted in some large-scale wild fires that completely destroyed landscapes and communities. These large-scale forest fires have become increasingly frequent over the past decade as compared to the last century during wetter conditions in the Southwest. This trend may be caused in part by more intense climate-related events, including severe droughts. Post-fire rainy seasons in the southwestern U.S. may pose the biggest threat to communities, both human and wildlife, because of the potential for record runoff events and the resulting mud and debris.
Instructional Strategies
Learning Contexts
Science Standards
The following National Science Education Standards are supported by this chapter:
- Unifying Concepts & Processes
- Systems, order, and organization
- Evidence, models, and explanation
- Change, constancy, and measurement
- Evolution and equilibrium
- Form and function
- Science as Inquiry
- Understandings about scientific inquiry
- Abilities necessary to do scientific inquiry
- Science & Technology
- Abilities of technological design
- Understandings about science and technology
- History and Nature of Science
- Science as a human endeavor
- Nature of scientific knowledge
- Physical Sciences
- Conservation of energy and increase in disorder
- Interactions of energy and matter
- Earth & Space Science
- Energy in Earth's system
- Science in Personal & Social Perspectives
- Personal and community health
- Environmental quality
- Natural resources
- Natural and human-induced hazards
Time Required
Four to five classroom periods will be needed to fully complete the activity. The times below are approximate and will vary depending on prior knowledge and skills.
- Case Study Introduction - 10 minutes
- Part 1. Download and install Google Earth and MyWorld GISTM Software - 25 minutes
- Part 2. Download the Google Earth and GIS Data - 15 minutes
- Part 3. Explore Sabino Canyon's Features - 45 minutes
- Part 4. Rainfall and Streamflow: How do they Relate? - 45 minutes
- Part 5. Investigate the Summer Monsoon - 45 minutes