Download conservation data

San Pedro River Wet-Dry Maps (August 2008)

The San Pedro River wet/dry mapping dataset is a community effort to track the river’s health by monitoring the persistence of surface water during the driest time of each year. It is created by recording the end points of every wet section of the San Pedro River during June each year. Maps depict the wet portion of the San Pedro River.

• 2008 Wet-Dry Maps (updated 8/26/2008)
• 2007 Wet-Dry Maps (updated 4/14/2008)

Ecological Implications of Verde River Flows (February 2008)

Presents a literature review and results of a May 2007 workshop where 35 subject experts from 16 agencies and institutions synthesized the state of knowledge for central Arizona’s Verde River. Report describes the river’s ecosystem, including its hydrology, geomorphology, riparian, and aquatic habitats, and fish and wildlife species – and how components would respond to changes in surface- and groundwater flows.

Download file (4.1 MB)

State of the Las Ciénegas NCA, Part III: Condition of Riparian Habitats and Channel Geomorphology (February 2008)

Presents information on the condition of riparian habitats and compares these with objectives established in BLM’s Resource Management Plan. Includes 1) an analysis of data collected between 1990 and 2006 on the condition of the NCA’s riparian forests and stream channel geomorphology, 2) an ecological state-and-transition model that describes relationships between habitat types and disturbance forces, and 3) a review of monitoring protocols with options for making monitoring more informative and efficient.

Download file (7.4 MB)

Habitat Mapping and Conservation Analysis to Identify Critical Streams for Arizona’s Native Fish (November 2007)

Describes the methods used to develop a GIS dataset for 33 native fish species in Arizona, presents results of some analyses using the data, and describes the data’s utility for the conservation of native fish. This is a preprint of an article published in Aquatic Conservation: Marine and Freshwater Ecosystems, Vol. 17: 737-748 (2007).www.interscience.wiley.com

Download file (< 1 MB)

State of the Las Ciénegas NCA, Part II: Gila Topminnow Population Status and Trends (July 2007)

This study analyzed 15 years of data on the endangered Gila topminnow (Poeciliopsis occidentalis occidentalis) to determine the population status and trend at Las Cienegas. We also tested alternative monitoring protocol to provide managers with more timely and reliable information on topminnow populations.

Download file (1.5 MB)

Rivers and Water Management in the Southwest (June 2007)

Describes challenges for managing water resources in the Southwest, and recommends actions to improve ecologically sustainable water management. Published in May/June 2007 issue of Southwest Hydrology.

Download file (1.3 MB)

Arizona Statewide Freshwater Assessment GIS Data Package (June 2006)

Includes 3 spatial datasets mapped to 1:100,000 scale hydrography for Arizona, including 1) the habitat for 33 native fish species, 2) former and current perennial surface flow for Arizona’s rivers, and 3) the distribution of threatened and endangered species that require aquatic or riparian habitats.

Download file (10 MB)

Interbasin Groundwater Flow at the Benson Narrows, Arizona (March 2005)

Describes research indicating groundwater is moving through the floodplain alluvial aquifer at Three Links Farm, and that most of this water originates from the Upper San Pedro River Basin. Published in March/April 2005 issue of Southwest Hydrology.

Download file (< 1 MB)

The Lower San Pedro River—Hydrology and Flow Restoration for Biodiversity Conservation (May 2004)

Describes The Nature Conservancy's flow management approach to increasing water supply for riparian vegetation, based largely on results from hydrologic analyses indicating that retiring agricultural pumping at key locations increases water availability for riparian vegetation. Paper presented at USFS conference, May 11-15, 2004.

Download file (< 1 MB)

Watershed Improvement Using Prescribed Burns as a Way to Restore Aquatic Habitat for Native Fish (May 2004)

Documents efforts by TNC and BLM to test a model that prescribed burns can be used to improve watershed conditions and aquatic habitat conditions. Study documents pre- and post-treatment results for the response of grasslands and for populations of the threatened Gila chub (Gila intermedia). Paper presented at USFS conference, May 11-15, 2004.

Download file (<1 MB)