Every June groups of volunteers walk the entire 170 mile length of the San Pedro River and record where it is wet and where it is dry during the hottest, driest time of the year. Twenty years’ worth of data on summertime surface flows in the San Pedro River within the San Pedro Riparian National Conservation Area (SPRNCA) are now available as an animation. Watch to see the changes in surface flow over time. These observations were recorded by citizen scientists through the Wet/Dry Mapping project- a collaboration between TNC and the Bureau of Land Management on this particular reach of the San Pedro River. Follow this link to see what they found from 1999 to 2021 on the approximately 50 miles of the San Pedro River that flows through the SPRNCA.
Notes about the data and animation:
1. Use the play, pause, and advance buttons at the bottom to view the animation.
2. Use the plus or minus keys to zoom in on portions of the river.
3. Survey dates varied from year to year, but have been standardized to June 29 for purposes of this animation.
4. Although the animation time scale at the bottom indicates a one year date range, the data shown is actually the annual standardized June 29th survey date. To make the scale date appear as that one point in time, click on and drag one of the time markers on top of the other.
Aerial view of the Parks West restoration site overseen by TNC. Taken March 16, 2020.
Conservancy staffers, Dale Turner and Amanda Rebore, helping to map the Sabn Pedro River in Arizona. They use a GPS unit to denote the end of the water flow on the LowerSan Pedro River. They hiked through the Conservancy’s San Pedro Preserve.
Our Approach to Science
The Nature Conservancy’s conservation science program in Arizona engages stakeholders and expertise in applied science and policy to develop new information, ideas, and tools that can help solve some of our most pressing challenges affecting people and nature
Explore Our Science
We are working with partners and stakeholders to accelerate the pace and scale of forest restoration for a healthy Arizona
Mapping the Status of River Streams
Wet/dry mapping provides a low-cost, river-wide snapshot of hydrologic conditions for rivers with interrupted perennial surface flows.
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