Gregory M Zarus

Questions and Answers (68) View all

• Answer added in Water Quality
  11 What is the general pollution degradation rate through a freshwater river?
  By Wayne Brazier · Nelson Mandela Metropolitan University
  Gregory Zarus · Centers for Disease Control and Prevention

  For readings on Hadi's point, look at the QUAL2E model and empirical studies that looked at the variability of factors in the model. Science Direct.c... [more]

  For readings on Hadi's point, look at the QUAL2E model and empirical studies that looked at the variability of factors in the model. Science Direct.com offers several (50+) publications on the use of QUAL2E (or earlier versions). CUNY (university) has some information on their work on their website. Perhaps, you can find a contact there. If you have details about your problem, perhaps we can direct you better.
  Following
• Answer added in Water Quality
  11 What is the general pollution degradation rate through a freshwater river?
  By Wayne Brazier · Nelson Mandela Metropolitan University
  Gregory Zarus · Centers for Disease Control and Prevention

  Look at 1 and 2 first --then see which of the others are most suitable 

  Look at 1 and 2 first --then see which of the others are most suitable
  Following
• Answer added in Water Quality
  11 What is the general pollution degradation rate through a freshwater river?
  By Wayne Brazier · Nelson Mandela Metropolitan University
  Gregory Zarus · Centers for Disease Control and Prevention

  Hi Wayne, As Beranrd stated, its a complicated answer. When you find the answer, let us know so that we can come to you. In the mean time, you might... [more]

  Hi Wayne, As Beranrd stated, its a complicated answer. When you find the answer, let us know so that we can come to you. In the mean time, you might want to look into a few "river models" to see what relationships are known about the factors I also recommend reading the following references (and then follow some of their references): US EPA has this guide: www.epa.gov/athens/wwqtsc/courses/wasp7/transport/Dispersion.ppt‎ here is a chapter in a standard text: https://ceprofs.civil.tamu.edu/ssocolofsky/cven489/downloads/book/ch3.pdf here are other refs that give individual element info: Longitudinal dispersion in rivers: The persistence of skewness in observed data Carl F. Nordin Jr., Brent M. Troutman Article first published online: 9 JUL 2010 DOI: 10.1029/WR016i001p00123 Plane source injector design for river dispersion studies, CB Lepage - 1996 http://link.springer.com/article/10.1007/BF00044885 Carbon Storage and Fluxes within Freshwater Wetlands: a Critical Review Birol Kayranli & Miklas Scholz & Atif Mustafa & Åsa (2009) White PS, Walker JL (1997) Approximating nature’s variation:selecting and using reference information in restoration ecology.Restoration Ecology 5:338–349 Zedler JB (2000) Progress in wetland restoration ecology. Trends in Ecology & Evolution 15:402–407
  Following
• Answer added in Biomonitoring
  9 What are the possible ways to promote benthic organisms' diversity in a stream system?
  By Dr.K.Mophin Kani · Manonmaniam Sundaranar University
  Gregory Zarus · Centers for Disease Control and Prevention

  To Azubuike Chukwuka's point: I it is most economical to focussing on reducing the "first flush" of rains: See several works of Haejin Lee (et al) in... [more]

  To Azubuike Chukwuka's point: I it is most economical to focussing on reducing the "first flush" of rains: See several works of Haejin Lee (et al) in the journal Water Research (2001-2007) also see: Appel, P.L., Hudak, P.F., 2001. Automated sampling of stormwater runoff in an urban watershed, North-Central Texas. J. Eviron. Sci. Health, A 36 (6), 897–907. Barbosa, A.E., Hvitved-Jacobsen, T., 1999. Highway runoff and potential for removal of heavy metals in an infiltration pond in Portugal. Sci. Total Environ. 235, 151–159. Bertrand-Krajewski, J.-L., Chebbo, G., Saget, A., 1998. Distribution of pollutant mass vs volume in stormwater discharges and the first flush phenomenon. Water Res. 32 (8), 2341–2356. Brezonik, P.L., Stadelmann, T.H., 2002. Analysis and predictive models of stromwater runoff volumes, loads, and pollutants concentrations from watersheds in the Twin Cities metropolitan area, Minnesota, USA. Water Res. 36, 1743–1757. Buffleben, M.S., Zayeed, K., Kimbrough, D., Stenstrom, M.K., Suffet, I.H., 2002. Evaluation of urban non-point source runoff of hazardous metals entering Santa Monica Bay, California. Water Sci. Technol. 45 (9), 263–268. Deletic, A., 1998. The first flush load of urban surface runoff. Water Res. 32 (8), 2462–2470. Deletic, A.B., Maksimovic, C.T., 1998. Evaluation of water quality factors in storm runoff from paved areas. J. Environ. Eng., ASCE 124 (9), 869–879. Larsen, T., Broch, K., Andersen, M.R., 1998. First flush effects in an urban catchment area in Aalborg. Water Sci. Technol. 37 (1), 251–257. Lau, S.-L., Stenstrom, M.K., 2002. Best Management Practices to Reduce Pollution from Stormwater in Highly Urbanized areas. WEF Tech, Chicago, IL September 30–October 3. Lee, J.H., Bang, K.W., Ketchum, L.H., Choe, J.S., Yu, M.J., 2002. First flush analysis of urban storm runoff. Sci. Total Environ. 293, 163–175. Legret, M., Pagotto, C., 1999. Evaluation of pollutant loadings in the runoff waters from a major rural highway. Sci. Total Environ. 235 (1–3), 143–150. Ma, J.-S., Khan, S., Li, Y.-X., Kim, L.-H., Ha, S., Lau, S-L., Kayhanian, M., Stenstrom, M.K., 2002. First flush phenomena for highways: how it can be meaningfully defined, Proceedings of the 9th International Conference on Urban Drainage, Portland, Oregon. Saget, A., Chebbo, G., Bertrand-Krajewski, J.-L., 1996. The first flush in sewer systems. Water Sci. Technol. 33 (9), 101–108. Sansalone, J.J., Buchberger, S.G., 1997. Partitioning and first flush of metals in urban roadway storm water. J. Environ. Eng., ASCE 123 (2), 134–143. Stenstrom, M.K., Lau, S.-L., Lee, H.-H., Ma, J.-S., Ha, H., Kim, L.-H., Khan, S., Kayhanian, M., 2000. First flush stormwater runoff from highways, Research report for California Department of Transportation, September, 2000. Stenstrom, M.K., Lau, S.-L., Ma, J.-S., Ha, H., Lim, L.-H., Lee, S., Khan, S., Kayhanian, M., 2001. First flush stormwater runoff from Highways, Research report for Department of California Transportation, September, 2001. Stenstrom, M.K., et al., 2002. First Flush Stormwater runoff from Highways (year 3), Research report for Department of California Transportation, July, 2002. Strecker, E.W., Quigley, M.M., Urbonas, B.R., Jones, J.E., Clary, J.K., 2001. Determining urban storm water BMP effectiveness. J. Water Resour. Plann. Manage.-ASCE 127 (3), 144–149
  Following
• Answer added in Biomonitoring
  9 What are the possible ways to promote benthic organisms' diversity in a stream system?
  By Dr.K.Mophin Kani · Manonmaniam Sundaranar University
  Gregory Zarus · Centers for Disease Control and Prevention

  Look at publications on relationships between DO and BO or TMDL and BO. I will see if I can attach a few when I return to my computer. However, there ... [more]

  Look at publications on relationships between DO and BO or TMDL and BO. I will see if I can attach a few when I return to my computer. However, there are many out there. Simply: prevent suspended solids and promote DO (catch run off, keep water cool, create falls with fish passes).
  Following