1 / 17

CE5504 – Surface Water Quality Modeling

CE5504 Surface Water Quality Modeling. General Lecture 2. Model Development. CE5504 – Surface Water Quality Modeling. Empirical Models. Secchi disk and chlorophyll. (Chapra 1997, Figure 29.6). CE5504 – Surface Water Quality Modeling. Empirical Models. Vollenwieder plot .

annice
Download Presentation

CE5504 – Surface Water Quality Modeling

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. CE5504 Surface Water Quality Modeling General Lecture 2. Model Development CE5504 – Surface Water Quality Modeling

  2. Empirical Models Secchi disk and chlorophyll (Chapra 1997, Figure 29.6) CE5504 – Surface Water Quality Modeling

  3. Empirical Models Vollenwieder plot (Chapra 1997, Figure 29.1) CE5504 – Surface Water Quality Modeling

  4. Linked Empirical-Mechanistic Models (Chapra 1997, Figure 29.4) CE5504 – Surface Water Quality Modeling

  5. Mechanistic Mass Balance Models (Chapra 1997, Figure 1.5) CE5504 – Surface Water Quality Modeling

  6. Temporal Resolution (Chapra 1997, Figure 18.8) CE5504 – Surface Water Quality Modeling

  7. Spatial Resolution (Chapra 1997, Figure 16.1) CE5504 – Surface Water Quality Modeling

  8. Time and Space Scale of Water Quality Problems (Chapra 1997, Figure 18.9) CE5504 – Surface Water Quality Modeling

  9. Kinetic Resolution Soluble Reactive Phosphorus Total Phosphorus Dissolved Organic Phosphorus Refractory Particulate Phosphorus Available Particulate Phosphorus CE5504 – Surface Water Quality Modeling

  10. The Guiding Principle Things should be made as simple as possible -- but no simpler. Albert Einstein image source: www.physik.uni-frankfurt.de/~jr/physpiceinstein.html

  11. unlimited cost desired reliability Model Reliability cost + $ cost Model Complexity Defensible, Credible, Cost-Effective

  12. Striking a Balance Model Complexity Screening  Management  Research

  13. Modeling: Historical Development • 1925-1960 (Streeter-Phelps) • Problems: untreated and primary effluent • Pollutants: BOD • Systems: streams and estuaries (1D) • Kinetics: linear, feed forward • Solutions: analytical (Chapra 1997) CE5504 – Surface Water Quality Modeling

  14. Modeling: Historical Development • 1960-1970 (Computerization) • Problems: primary and secondary effluent • Pollutants: BOD • Systems: streams and estuaries (1D/2D) • Kinetics: linear, feed forward • Solutions: analytical and numerical (Chapra 1997) CE5504 – Surface Water Quality Modeling

  15. Modeling: Historical Development • 1970-1977 (Biology) • Problems: eutrophication • Pollutants: nutrients • Systems: streams, lakes and estuaries (1D/2D/3D) • Kinetics: nonlinear, feedback • Solutions: numerical (Chapra 1997) CE5504 – Surface Water Quality Modeling

  16. Modeling: Historical Development • 1977- 2000 (Toxics) • Problems: toxics • Pollutants: organics, metals • Systems: sediment-water interactions • food chain interations, streams, lakes and estuaries • Kinetics: linear, feed forward • Solutions: analytical (Chapra 1997) CE5504 – Surface Water Quality Modeling

  17. Whitefish Benthic Invertebrates Phytoplankton Modeling: Historical Development • 2000 - present (Ecosytems) • Problems: ecosystem change, climate, invasives • Pollutants: natural components – carbon, nutrients, organisms • Systems: primary production, food web interactions • Kinetics: nonlinear, feedback • Solutions: numerical (Chapra 1997) CE5504 – Surface Water Quality Modeling

More Related