rnr384_09 done - Introduction to Watershed Hydrology and...

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1 Introduction to Watershed Hydrology and Management Water Management Infrastructure and institutions designed to supply and treat water for human use. Dams, aqueducts, ditches, groundwater development, and sewage treatment Watershed Management Is the process of managing resources of a watershed to meet social goals, but under the conditions that soil and water resources are not adversely affected, and that production is sustainable over the long-term. Watershed Management Concerns • Protecting and Improving Soil Productivity Erosion Control Land Restoration Stream Flow Regime Management Flood Prevention Water Augmentation •Protection of Aquatic and Riparian Habitat Stream Improvement and Instream Flow Analysis •Water Quality Management Implementation of Best Management Practices Water Quality Monitoring Watershed Planning Environmental Education Cannonsvil e Watershed Catskil s, NY – Water Supply for Ney York City Importance There are communities in the State of Arizona that must truck in bottled water every year because of a lack of supply. Most of the threaten and endangered species in the Southwest are directly associated with riparian and aquatic ecosystems. Over 70% of Arizona’s riparian and wetland systems have been loss over the last century due to limited water, pollution and sever channel erosion. Although clean potable water is necessary for life it is becoming harder to find due to pollution, overuse and population growth. Even streams in the eastern United States are starting to go dry. By the end of this class over 200 children around the world will have died because they did not have enough clean water. What is a watershed? Watershed Management address concerns at multiple scales. Typically, Watershed Managers work at the Hillslope and Landscape Scale. A Watershed is: 1. A Physical Terrain Feature 2. Management Unit 3. Ecosystem
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2 Watershed Characteristics Terrain: Elevation, Slope, Aspect, Drainage, Shapes, Area Climate: Precipitation, Energy Geology/Soils: Permeability, Particle Sizes Vegetation: Species, Cover, Leaf Area, Root Types, Biomass Land Use/Land Cover: Impervious, Compaction, Drainage, Chemicals History Watershed Characteristics High Med-High Low Information High Med-High Low Value ($$$) Yes No No Impervious High High Low Intro Chemical High High Low Bulk Density Variable Uniform Variable Soil Flat Flat Variable Slope Urban Agland Wildland Feature Arizona has different hydrologic systems Water Quality Problems include: Heavy Metals Nutrients Organics Sediment Complexity of Landscape Processes in the West Characteristics of Southwestern Watersheds Arid to Semiarid Climate – Ephemeral streams Population Increasing – Highest growth rates in the country High Consumptive Use of Water – 80-90% Agriculture Potential Evaporation exceeds Precipitation Water Supply of Greater Interest Then Water Quality Erosion and Sedimentation Primary Water Quality Problem Mosaic of Land Ownership – Public Land +80% in AZ
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This note was uploaded on 04/06/2009 for the course RNR 384 taught by Professor Follset during the Spring '09 term at University of Arizona- Tucson.

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rnr384_09 done - Introduction to Watershed Hydrology and...

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