1. Lecture 1 - 1 ERS 482/682 (Fall 2002) ERS 482/682 Small Watershed Hydrology

2. Lecture 1 - 2 ERS 482/682 (Fall 2002) Preliminaries Syllabus Schedule Background Survey

3. Lecture 1 - 3 ERS 482/682 (Fall 2002) Hydrology The science that deals with the waters of the earth and their occurrence, distribution, and circulation at the surface, underground, and in the atmosphere. Figure 1.1 (Manning 1987)

4. Lecture 1 - 4 ERS 482/682 (Fall 2002) Small watershed hydrology Issues –Often ungaged (i.e. little or no data) –Local variables may dominate –Temporal/spatial variability may be important Significance –Most watersheds are small! –TMDL assessment Example: What is a waterbody?

5. Lecture 1 - 5 ERS 482/682 (Fall 2002) Hydrologic cycle Figure 1.1 (Dunne & Leopold 1978)