Periphyton and Macroinvertebrate Communities at Five Sites in the San Joaquin River Basin, California, during June and September, 2001

2004 ◽  
Author(s):  
Larry R. Brown ◽  
Jason T. May
Keyword(s):  
River Basin ◽  
Macroinvertebrate Communities ◽  
San Joaquin River

scholarly journals Policy Innovation and Governance for Irrigation Sustainability in the Arid, Saline San Joaquin River Basin

2020 ◽  
Vol 12 (11) ◽  
pp. 4733
Author(s):  
Nigel W. T. Quinn
Keyword(s):  
Water Quality ◽  
Resource Management ◽  
River Basin ◽  
San Joaquin Valley ◽  
Irrigated Agriculture ◽  
Policy Response ◽  
The West ◽  
West Side ◽  
Salt Load ◽  
San Joaquin River

This paper provides a chronology and overview of events and policy initiatives aimed at addressing irrigation sustainability issues in the San Joaquin River Basin (SJRB) of California. Although the SJRB was selected in this case study, many of the same resource management issues are being played out in arid, agricultural regions around the world. The first part of this paper provides an introduction to some of the early issues impacting the expansion of irrigated agriculture primarily on the west side of the San Joaquin Valley and the policy and capital investments that were used to address salinity impairments to the use of the San Joaquin River (SJR) as an irrigation water supply. Irrigated agriculture requires large quantities of water if it is to be sustained, as well as supply water of adequate quality for the crop being grown. The second part of the paper addresses these supply issues and a period of excessive groundwater pumping that resulted in widespread land subsidence. A joint federal and state policy response that resulted in the facilities to import Delta water provided a remedy that lasted almost 50 years until the Sustainable Groundwater Management Act of 2014 was passed in the legislature to address a recurrence of the same issue. The paper describes the current state of basin-scale simulation modeling that many areas, including California, are using to craft a future sustainable groundwater resource management policy. The third section of the paper deals with unique water quality issues that arose in connection with the selenium crisis at Kesterson Reservoir and the significant threats to irrigation sustainability on the west side of the San Joaquin Valley that followed. The eventual policy response to this crisis was incremental, spanning two decades of University of California-led research programs focused on finding permanent solutions to the salt and selenium contamination problems constraining irrigated agriculture, primarily on the west side. Arid-zone agricultural drainage-induced water quality problems are becoming more ubiquitous worldwide. One policy approach that found traction in California is an innovative variant on the traditional Total Maximum Daily Load (TMDL) approach to salinity regulation, which has features in common with a scheme in Australia’s Hunter River Basin. The paper describes the real-time salinity management (RTSM) concept, which is geared to improving coordination of west side agricultural and wetland exports of salt load with east side tributary reservoir release flows to improve compliance with river salinity objectives. RTSM is a concept that requires access to continuous flow and electrical conductivity data from sensor networks located along the San Joaquin River and its major tributaries and a simulation model-based decision support designed to make salt load assimilative capacity forecasts. Web-based information dissemination and data sharing innovations are described with an emphasis on experience with stakeholder engagement and participation. The last decade has seen wide-scale, global deployment of similar technologies for enhancing irrigation agriculture productivity and protecting environmental resources.

scholarly journals Effect of Hyporheic Exchange on Macroinvertebrate Community in the Weihe River Basin, China

Water ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 457
Author(s):  
Qidong Lin ◽  
Jinxi Song ◽  
Carlo Gualtieri ◽  
Dandong Cheng ◽  
Ping Su ◽  
...  
Keyword(s):  
River Basin ◽  
Transport Processes ◽  
Macroinvertebrate Community ◽  
Hyporheic Exchange ◽  
Macroinvertebrate Communities ◽  
Fine Grained ◽  
River Bed ◽  
Weihe River ◽  
Abundance And Diversity ◽  
Weihe River Basin

The effect of hyporheic exchange on macroinvertebrates is a significant topic in ecohydraulics. A field study was conducted during May and June 2017 to investigate the impacts of magnitude and patterns of hyporheic exchange on the sediment macroinvertebrate community in the Weihe River basin. The results demonstrate that upwelling flows cause resuspension of riverbed sediment, increasing the proportion of swimmer groups (such as Baetidae) in the macroinvertebrate community. However, large resuspension of river bed sediment results in a reduced abundance of macroinvertebrates. By controlling the transport processes of dissolved oxygen (DO), dissolved organic carbon (DOC), nutrients, temperature, and different patterns of hyporheic exchange strongly influence the structure of macroinvertebrate communities. Downwelling is more likely to produce rich invertebrate communities than upwelling. The magnitude for the hyporheic flux of 150–200 mm/d was optimal for the macroinvertebrate community in the Weihe River Basin. Above or below this rate results in a decline in community abundance and diversity. We suggest that research is conducted to better understand the effects of hyporheic exchange across bedforms on macroinvertebrate communities. The study supports any activities to preserve the ecological functions and health of rivers dominated by fine-grained sediments.

Potential Implications of PCM Climate Change Scenarios for Sacramento–San Joaquin River Basin Hydrology and Water Resources

2004 ◽  
Vol 62 (1-3) ◽  
pp. 257-281 ◽  
Author(s):  
Nathan T. VanRheenen ◽  
Andrew W. Wood ◽  
Richard N. Palmer ◽  
Dennis P. Lettenmaier
Keyword(s):  
Climate Change ◽  
Water Resources ◽  
River Basin ◽  
Climate Change Scenarios ◽  
San Joaquin River ◽  
Basin Hydrology ◽  
Hydrology And Water Resources

Comparative study on macroinvertebrate communities along a reservoir cascade in Xiangxi River Basin

2007 ◽  
Vol 27 (12) ◽  
pp. 4963-4971 ◽  
Author(s):  
Meiling Shao ◽  
Xinqin Han ◽  
Zhicai Xie ◽  
Xinghuan Jia ◽  
Ruiqiu Liu ◽  
...  
Keyword(s):  
Comparative Study ◽  
River Basin ◽  
Macroinvertebrate Communities ◽  
Xiangxi River

Spatial and Temporal Patterns of Macroinvertebrate Communities in the Du River Basin in Northern Vietnam

2010 ◽  
Vol 25 (4) ◽  
pp. 637-647 ◽  
Author(s):  
T. H. Hoang ◽  
K. Lock ◽  
K. Chi Dang ◽  
N. De Pauw ◽  
P. L.M. Goethals
Keyword(s):  
River Basin ◽  
Temporal Patterns ◽  
Macroinvertebrate Communities ◽  
Spatial And Temporal Patterns ◽  
Northern Vietnam

scholarly journals Regional skew for California, and flood frequency for selected sites in the Sacramento-San Joaquin River Basin, based on data through water year 2006

2011 ◽  
Author(s):  
Charles Parrett ◽  
Andrea Veilleux ◽  
J.R. Stedinger ◽  
N.A. Barth ◽  
Donna L. Knifong ◽  
...  
Keyword(s):  
River Basin ◽  
Flood Frequency ◽  
San Joaquin River
Sign in / Sign up

Export Citation Format

Share Document