Arizona Hydrological Society upcoming events

Flagstaff Hydrology Student Mixer (28 Aug 2026)

Sat, 29 Aug 2026 01:00:00 GMT

Join the Flagstaff Chapter for another Hydrology Student Mixer on Friday August 28 at 6 pm at Marvin Glotfelty's home! $5 for members, $10 non-members and free for students. Pizza, appetizers and beverages provided.

2026 AHS Annual Symposium (9 Sep 2026)

Wed, 09 Sep 2026 07:00:00 GMT

Early Bird Pricing will go live on April 20th.

**Please note, Casino Night registration is automatically included in a FULL Regular Registration ticket. You will only need to purchase this add-on if you would like to invite a partner, if you are a student, or purchased a one-day ticket**

Cancellation policy: If you cancel before September 2, AHS will refund your registration fee minus a 10% processing fee; from September 3-8, AHS will refund 50% of your registration fee.

AHS 2026 Symposium A La Carte (9 Sep 2026)

Wed, 09 Sep 2026 07:00:00 GMT

ADWR 2026 Symposium Registration (9 Sep 2026)

Wed, 09 Sep 2026 07:00:00 GMT

Cancellation policy: If you cancel before September 2, AHS will refund your registration fee minus a 10% processing fee; from September 3-8, AHS will refund 50% of your registration fee.

2026 Symposium: Sponsors & Exhibitors (9 Sep 2026)

Wed, 09 Sep 2026 15:00:00 GMT

PLEASE READ THE FOLLOWING:

I understand that my fee includes admission for the following number of attendees, who I must name as GUESTS on this registration form:

1 for Exhibitors and Copper Sponsors
2 for Silver Sponsors
3 for Gold Sponsors
4 for Platinum Sponsors

I also understand that, in addition to the above GUESTS, I can add one ADDITIONAL ATTENDEE for an extra charge (this will appear as an option during the registration process).

Depending on the Registration you choose, please select spots that are available for your level:

Platinum and Gold Sponsors (S8–S11),
Silver Sponsors (S1-S7 and S12-S16),
Premium Exhibitors (P1-P12),
Regular Exhibitors (R1-R4
Table Top Exhibitors (T1-T3)

If we need to cancel your registration because you exceed these limits, you will be charged a 15% cancellation fee!

You must pay in full by cash, check, or credit card within 30 days to secure your reservation. No refunds for cancellations will be issued after August 11th

2026 Symposium: Event & Other Sponsors (9 Sep 2026)

Wed, 09 Sep 2026 15:00:00 GMT

Each event sponsorship includes one full symposium registration.

You must pay in full by cash, check, or credit card within 30 days to secure your reservation.

2026 AHS Symposium Watershed Modeling Workshop (9 Sep 2026)

Wed, 09 Sep 2026 15:00:00 GMT

Distributed Watershed Modeling for Flood Simulation: Bringing Research Tools to Practice

Watershed modeling is a critical tool for engineers and scientists working in flood risk assessment, infrastructure design, and water resources planning. In Arizona, practitioners commonly rely on HEC-HMS for event-based hydrologic simulations following methodologies established by the Arizona Department of Transportation (ADOT) and the Flood Control District of Maricopa County (FCDMC). While effective, these semi-distributed approaches may not capture the full spatial variability of watershed processes that influence flood behavior.

This workshop introduces participants to a new generation of watershed modeling tools by comparing HEC-HMS with tRIBS (TIN-based Real-time Integrated Basin Simulator), a fully-distributed, open-source hydrologic model developed over 20+ years of research and now available on GitHub. Participants will work through a real-world case study in the South Mountain Fan (SMF) watershed in the Phoenix metropolitan area, applying the tRIBS model to the largest observed streamflow event on August 12, 2014, and two subsequent events within the same summer. Attendees will gain first-hand insight into the capabilities, limitations, and the value added to consulting and design projects by applying distributed hydrologic models.

A key feature of this workshop is the use of modern cyberinfrastructure. Participants will use GitHub Codespaces and Jupyter Notebooks to interact with tRIBS, eliminating the need for complex software installations and demonstrating how cloud-based tools are changing the landscape of hydrologic modeling. All workshop materials have been developed and tested in a university course at Arizona State University during the Spring 2026 semester.

Flagstaff Water Resources & Upper Lake Mary Paired Watersheds Trip (9 Sep 2026)

Wed, 09 Sep 2026 16:30:00 GMT

Join us Wednesday before the Annual Meeting and Ice Breaker Reception for a tour of the Walnut Creek Watershed, where geo-ecohydrology meets water resources development with topics including the growth of the Lake Mary fault systems, with Dr. Jeri Young Ben-Horin of the Arizona Geological Survey, structural geology and aquifer yield studies with Errol Montgomery, water supply and hydrology with Erin Young and Matthew Miller of City of Flagstaff Water Services, and watershed health and the Upper Lake Mary Paired Watershed research projects presented by Dr. Abe Springer of Northern Arizona University. We meet at the Drury Hotel at 9:15 AM and hop in a van field school style for a 9:30 AM departure. Lunch is provided. Bring water and sturdy footwear/outdoor clothing appropriate for hiking two-miles round trip on a forest service road, with some walking across semi-rocky native forest, and as appropriate for the Flagstaff weather in September (perfect and temperate, but potentially rainy and windy). We will have you back to the Drury at 3:30 PM in time for the 4 PM AHS Annual Meeting across the street at the High Country Conference Center.

*You MUST be a member to attend a field trip*

Itinerary:

9:30 AM	Depart Drury Hotel in vans 300 South Milton Road Flagstaff, AZ 86001 Free, covered parking available at the conference center/hotel
9:30 AM – 9:50 AM	Drive to Anderson Mesa
9:50 AM – 10:40 AM	Jeri Y. Ben-Horin, AZGS – growth ofthe Lake Mary fault system structural geology, seismology overview & Anderson Mesa Fault scarp stop Abe Springer, NAU, area overview
10:40 AM – 10:50 AM	Drive to Lower Lake Mary Ramada
10:50 AM – 12:30 PM (12:15 PM – 12:30 PM Lunch)	Abe Springer - watershed health & paired watershed study Erin Young, COF - water resources history and overview Errol Montgomery – well siting and yield studies Matthew Miller, City of Flagstaff - well performance and aquifer response to pumping at LM9
12:30 PM – 1:15 PM	Abe Springer and Matthew Miller – Walk to sink holes and spillway Jeri Y. Ben-Horin – walk tolava flows & quaternary offset
1:15 PM – 1:30 PM	Drive to LM-5 Paired Watershed
1:30 PM – 3:15 PM	Abe Springer lead 2 mile round trip hike Visit: · COSMOS soil moisture sensor · Stream Gaging station · Soil moisture monitoring station · Potentially, the ET tower location *Hike on a 2-track forest road with about 300 meters of hiking across rocky forest land since the forest road is closed for a seasonal quiet closure.
3:15 PM - 3:45 PM	Return to Drury by 4 PM for AHS Annual Meeting

2026 AHS Symposium Groundwater Workshop (9 Sep 2026)

Wed, 09 Sep 2026 19:30:00 GMT

Introduction to Building and Running Groundwater Models

This course will give students knowledge necessary for setting up, executing and using groundwater models. The half-day workshop will focus on using the use of groundwater models to model groundwater flow and transport. The groundwater model MODFLOW will be used as the primary modeling tool, but other surface water and groundwater models will be discussed. Students will be guided through example models using accessible files. Discussion of calibration of groundwater models and other more advanced topics will be included.

Post-Symposium CAMPIN’ in the PINES - CHOOSE YOUR OWN ADVENTURE (11 Sep 2026)

Fri, 11 Sep 2026 23:00:00 GMT

Extend your stay in the cool pines by participating in one of our Saturday field trips. Friday night camp out at Dogtown Lake Campground in Williams, Arizona and join us for a river-kitchen style dinner followed by fireside (weather-permitting) networking. Not a big tent camper? We have room blocks available at the Drury Inn for the weekend! Off-site participants will join us no later than 8:50 AM for departure from Dogtown Lake Campground.

You’ll pack your lunch before two incredible trips depart Dogtown Lake Campground on Saturday morning; one led by Erin Young, City of Flagstaff, exploring the Williams-area water resources, reservoirs, and wells.

Pack your boots and plenty of water for Option #2, with multiple moderate and slightly technical hikes (approximately 4 miles total) to Williams-area springs, waterfalls, and other neat hydrologic features. Enjoy an overview of the paired watershed studies, springs ecology and restoration, and Williams regional hydrogeology presented by Dr. Abe Springer (NAU) and Zachary Keller (SRP).

Wrap up the day with dinner at Historic Brewing Company (*dinner not included in trip cost*) before retiring back to Dogtown Lake Campground for another evening under the stars.

No camping equipment? Dietary restrictions? Need a ride? Carpooling is available! E-mail Lauren Baader (Lauren.Baader@tetratech.com) with any questions or concerns!

*Must be a member to attend the field trip*

Dogtown Wells Trip Itinerary:

7:30-9:00 AM	Build your own sandwich station/breakfast at Dogtown Lake Campground
9:00 AM	Depart Dogtown Lake - City of Williams
9:00 AM – 9:15 AM (15 minute drive)	Dogtown wells - Mesa butte fault Field trip guide - well logs
9:15 AM – 10:15 AM	Visit Wells: 55-583065 (City of Williams) 55-597241 (City of Williams) 55-576327 (City of Williams) Optional: 55-557724 (private well) Optional: 55-916881 (private well)
10:15 AM	20 min drive from Dogtown Lake to Santa Fe Dam
10:35 AM – 10:50 AM	Santa Fe Dam and Reservoir
10:50 AM – 11:10 AM	Visit Wells: 55-224424 (City of Williams) Optional: 55-584106 (private well)
11:10 AM	15 min drive from Santa Fe Dam to Cataract Creek
11:25 AM – 11:40 AM	Sink hole and open fractures in Cataract Creek about 0.4 mi. DS (north) of the Williams evaporation pond and treated discharge point to Cataract Cr.
11:40 AM – 12:00 PM	Lunch break
12:00 PM	15 min drive from Cataract Creek to McLellan Dam
12:15 PM – 12:30 PM	McLellan Dam and Reservoir
12:30 PM	15 min drive from McLellan Dam to Ashfork-Bainbridge
12:45 PM – 1:00 PM	Ashfork-Bainbridge Steel Dam: See notes from Don
1:00 PM	30 min drive from Ashfork-Bainbridge to base of BW Mtn
1:30 PM – 3:35 PM	Drive up Bill Williams Mtn: Estimated 1-2 hours to drive to the summit and back.
3:35 PM	25 min drive from base of Bill Williams Mtn to Dogtown Lake camp
4:00 PM	Arrive back at Dogtown Lake Camp
6:00 PM	Dinner at Historic Brewing Co.

Big Spring Trip Itinerary:

7:30-9:15 AM	DIY Sandwich Station and Breakfast @ Dogtown Lake Campground (meet at Dogtown Lake Campground by 9:00AM if not camping)
9:30 AM	Depart Dogtown Lake Campground 1250 S Pine Top Dr, Williams, AZ 86046
9:30 AM – 10:00AM	Drive to Big Spring Trailhead Head south on FR 132 to FR 140, turn right on FR 140. After 2 mile turn left on FR 3258. After 2.2 miles turn left on Perkinsville Rd. Go 1.5 miles then turn left on FR 139. After approximately 4.5 miles arrive at Big Spring trailhead.
10:00 AM– 12:00 PM	Hike to Big Spring (0.75 mile one way, ~60 ft elevation) Dr. Abe Springer, NAU – Topics: 4FRI, Overland Trail, Regional Hydrogeology, Springs ecology and restoration, paired watershed study overview Middle Springs Watershed #1
12:00 PM – 12:30 PM	Hike back to van (0.75 miles, ~60 ft elevation)
12:30 PM – 1:00 PM	Drive to Sycamore Falls Drive 2.9 miles on FS 139, turn right on FS109, Drive FS 109 about 2.2 miles to parking area for Sycamore Falls.
1:00 PM – 2:30 PM	Hike to Sycamore Falls (0.4 mile one way, uneven terrain) Abe Springer – Geology overview Lunch at the falls then hike back (0.4 mi) to vehicles
2:30-3:00	Drive to Flume
3:00-3:30	Hike down to Flume Area (0.5 mile one way, uneven terrain) Zachary Keller, SRP – SRP instrumentation and watershed monitoring
3:30-4:30	Return to Camp
6:00	Dinner at Historic Brewing Company 141 W Railroad Ave, Williams, AZ 86046