The Resource Apex and fuzzy model assessment of environmental benefits of agroforestry buffers for claypan soils, by G.M.M.M. Anomaa Senaviratne

Apex and fuzzy model assessment of environmental benefits of agroforestry buffers for claypan soils, by G.M.M.M. Anomaa Senaviratne

Label
Apex and fuzzy model assessment of environmental benefits of agroforestry buffers for claypan soils
Title
Apex and fuzzy model assessment of environmental benefits of agroforestry buffers for claypan soils
Statement of responsibility
by G.M.M.M. Anomaa Senaviratne
Creator
Contributor
Author
Thesis advisor
Subject
Genre
Language
eng
Summary
Contamination of surface waters with pollutants from agricultural land is a major threat to the environment. A field-size watershed study in Northeast Missouri showed that vegetated filter strips containing grass and grass+trees (agroforestry) buffers placed on contours reduced sediment and nutrient loadings by 11-35%. Watershed scale studies are overly expensive while computer simulated hydrologic models offer efficient and economical tools to examine environmental benefits of conservation practices. The current study used the Agricultural Policy Environmental eXtender (APEX) model and a fuzzy logic model to predict environmental benefits of buffers and grass waterways of three adjacent watersheds at the Greenley Memorial Research Center. During the second phase of the study, an automated computer technique was developed to optimize parameter sets for the APEX model for runoff, sediment, total phosphorous (TP) and total nitrogen (TN) losses. The APEX model was calibrated and validated satisfactorily for runoff from both pre- and post-buffer watersheds. The sediment, TP, and TN were calibrated only for larger events during the pre-buffer period (>50 mm). Only TP was calibrated by post-buffer models. The models simulated 13- 25% TP reduction by grass waterways, and 4-5% runoff and 13-45% TP reductions by buffers. The fuzzy model predicted runoff for the study watersheds and for watersheds 30 and 50 times larger in northern Missouri. A stepwise multi-objective, multi-variable parameter optimization technique improved calibration of sediments, TP, and TN after optimization for runoff parameters. The results of the study show that models can be used to examine environmental benefits provided long-term data are available
Cataloging source
MUU
http://library.link/vocab/creatorName
Senaviratne, G. M. M. M. Anomaa
Degree
Ph.D.
Dissertation note
Dissertation
Dissertation year
2013.
Government publication
government publication of a state province territory dependency etc
Granting institution
University of Missouri--Columbia
Illustrations
illustrations
Index
no index present
Literary form
non fiction
Nature of contents
  • dictionaries
  • bibliography
  • theses
http://library.link/vocab/relatedWorkOrContributorDate
1956-
http://library.link/vocab/relatedWorkOrContributorName
  • Udawatta, Ranjith P.
  • Anderson, S. H.
http://library.link/vocab/subjectName
  • Buffer zones (Ecosystem management)
  • Watershed hydrology
  • Claypan soils
  • Agroforestry
Label
Apex and fuzzy model assessment of environmental benefits of agroforestry buffers for claypan soils, by G.M.M.M. Anomaa Senaviratne
Instantiates
Publication
Copyright
Note
  • "A Dissertation presented to The Faculty of the Graduate School at the University of Missouri--Columbia In Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy."
  • Dissertation supervisor: Dr. Ranjith P. Udawatta
  • Dissertation supervisor: Dr. Stephen H. Anderson
  • Vita
Bibliography note
Includes bibliographical references
Carrier category
online resource
Carrier category code
cr
Carrier MARC source
rdacarrier.
Content category
text
Content type code
txt
Content type MARC source
rdacontent.
Control code
891140461
Extent
1 online resource (xx, 216 pages)
Form of item
online
Media category
computer
Media MARC source
rdamedia.
Media type code
c
Other physical details
illustrations (some color)
Specific material designation
remote
System control number
(OCoLC)891140461
Label
Apex and fuzzy model assessment of environmental benefits of agroforestry buffers for claypan soils, by G.M.M.M. Anomaa Senaviratne
Publication
Copyright
Note
  • "A Dissertation presented to The Faculty of the Graduate School at the University of Missouri--Columbia In Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy."
  • Dissertation supervisor: Dr. Ranjith P. Udawatta
  • Dissertation supervisor: Dr. Stephen H. Anderson
  • Vita
Bibliography note
Includes bibliographical references
Carrier category
online resource
Carrier category code
cr
Carrier MARC source
rdacarrier.
Content category
text
Content type code
txt
Content type MARC source
rdacontent.
Control code
891140461
Extent
1 online resource (xx, 216 pages)
Form of item
online
Media category
computer
Media MARC source
rdamedia.
Media type code
c
Other physical details
illustrations (some color)
Specific material designation
remote
System control number
(OCoLC)891140461

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