Geology 230

Groundwater/ Surface Water Interaction

California State University, Sacramento

Week 11:

Subsurface influence on surface organisms



Upon completion of this unit students should be able to:

  • Define different stream zones.

  • Examine the effect of floods on primary producers.

  • Discuss the effect of hyporheic flow on microorganisms and primary producers.

  • Evaluate the effect of hyporheic flow on invertebrates and fish.

  • Discuss scale issues and human influence on the hyporheic zone.


Reading Assignments:

1) Jones and Mulholland:  pp. 381-402.


2) Malcolm, I.A., Youngson, A.F., and Soulsby, C., 2003?, Survival of salmonid eggs in a degraded gravel-bed stream: effects of groundwater-surface water interactions:  River Research and Applications.


Malcolm et al.


3) Geist, D.R., Hanrahan, T.P., Arntzen, E.V., McMichael, G.A., Murray, C.J., and Chien, Y.J., 2002, Physicochemical characteristics of the hyporheic zone affect redd site selection by Chum salmon in the Columbia River: North American Journal of Fisheries Management, v. 22, p. 1077-1085.


Geist et al., 2002




Tim's summary of Jones and Mulholland, pp. 381-402:


Subsurface influence on organisms


Student 1:

Summary of Malcolm et al



Jay:   Why do the salmonids spawn in different areas?  What would happen if they used the same spawning grounds at different times of the year?  What do you think is the most important factor in redd site selection?  Why did the authors not look at grain size and what data could it have yielded?


Summary of Geist et al