In-Situ Environmental articles

Andy Jones compares the catfish industry to the jagged graph of a heartbeat displayed on an EKG machine. The peaks and valleys of that pulsating line are a vivid metaphor for the fluctuating fortunes of a seasonal business dependent on live animals and a dynamic market.

Jones is in a good position to make the connection. As a second-generation catfish farmer, he’s seen firsthand the highs that come with booming demand and the lows of a devastating fish kill. His father, Austin, s

Overview
Seeking a flow monitoring alternative for areas where mechanical meters were problematic, the Central California Irrigation District found an affordable and reliable solution with AgriFlo XCi meters and Doppler insert velocity sensors.

Challenge
From its point of origin at Jones Pumping Plant, The 117-mile long Delta Mendota Canal in central California delivers water from the Sacramento-San Joaquin Delta to the Mendota Pool in the Sa

Abstract
A new, fully-automated, closed-chamber system was developed for measuring photosynthetic activity in aquatic plants, algae, or corals during immersion. The performance of this system, which monitors oxygen exchange, was evaluated both in the laboratory and in situ under natural conditions using the seaweed Laminaria dtgitata. Intact, large individuals were placed inside the chamber and kept in place by a plastic grid in a transparent Perspex dome. The grid separ