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D. González. and M. Mendoza

Prioritization of sub-watersheds for the application of environmental policies in the Basin of Lake Cuitzeo. CIGA. CENTRO DE INVESTIGACIONES EN GEOGRAFÍA AMBIENTAL. D. González. and M. Mendoza. Background.

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D. González. and M. Mendoza

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  1. Prioritization of sub-watersheds for the application of environmental policies in the Basin of Lake Cuitzeo CIGA CENTRO DE INVESTIGACIONES EN GEOGRAFÍA AMBIENTAL D. González. and M. Mendoza

  2. Background • Lake Cuitzeo Basin is an important ecologic area, where is a strong pressure on the natural resources by the productive activities. • Its necessary the implementation of the environmental programs to keep the equilibrium among the productive activities and natural resources. (conservation and sustainable use territorial policies) • It becomes necessary to identify and recommend to the authorities which are the priorities areas to apply the environmental programs

  3. Objective • Identify the priority water-sheds for the implementation of selected environmental policies to support sustainable development in the Lake Cuitzeo Basin

  4. Study site • Center of Mexico • Michoacan state • 4,000 Km.2 • Transmexican Volcanic Belt • Lake Cuitzeo (Ecological importance) • 55 watersheds • 28 Municipalities • Urban expansion • High migration rates Spot image 321, Dec 2006

  5. Method Assessment of sub-watersheds Ranking of sub-watersheds Formulation Aggregation in sub-watersheds Assessment of sub-watersheds

  6. Concerned policies According to the local environmental law, the main objective for the application of the environmental policies are: Conservation • To preserve the environmental elements that allow maintain the environmental services • To minimize the conflicts between the productivity activities and the conservation programs Sustainable use • Define the areas where the productive programs can be developed according to the distribution of the land capability • To minimize the deterioration of areas containing a well preserved natural capital

  7. Findcriteriatoassestheobjectives • 1. Findcriteria, itshould be: • Relevance • be related to the assessment goal • be sensitive and responsive to change in the system. • Analytic • be theoreticallyfounded, • Measurable • be easy to detect, record, and interpret • be costeffective • be precisely-defined • 2. Standardization. • Maximum • Interval • Goal • Pairwisecomparition • Rank order Continous variables Discrete variables

  8. Criteria structure for assessing the suitability for conservation policy

  9. Criteria structure for assessing the suitability for the sustainable use policy

  10. Example. Suitability assessment of the municipalities Forest stability Stable productive areas

  11. Results Overall suitability assessment of the sub-watersheds for the conservation policy (A) and sustainable use (B)

  12. Ranking of sub watersheds Selected criteria for the assessment of the sub-watersheds • Supply • -Connectedness of suitability classes • -Percentage of cover of the best performance cells per spatial unit. • Demand • - Relative poverty index • Decree • - Percentage of area assigned for conservation and sustainable use by the EMPLCB

  13. Theoverallsuitabilityindexwereassesedthrough 3 scenarios • -Supply, Demand, Decree • Decision rules wereimplementedtoconstructanintegrativesuitabilitymapmap. Relative importance of criteria in each scenario

  14. Decision rules to classify the integrative suitability map

  15. Potential conflicts in sub watersheds • Potential conflicts among the implementation of the environmental policies are identified based on the comparison of the suitability indexes for each sub-watershed

  16. Map of potential conflicts among environmental policies by sub-watershed

  17. Total area in percentage by conflict area. Comparison between natural and administrative spatial units Sub-watersheds Municipalites No conflict 1st order No conflict 2ndorder Mixed 2nd order Mixed 3th order

  18. Conclusions • The multi-temporal analysis through a long and a short term of time allows identifying the trends of the land use change for support the implementation of the environmental policies. • Three different orientations of the municipalities were identified: 1) Oriented to productive activities, 2) Oriented to conservation activities and 3) Mixed oriented • The prioritization of the sub-watersheds could be a practical information that can be used as support to planning the implementation and the monitoring of the environmental programs in the framework of the EMPLCB • Intermunicipal efforts have to be implemented in the framework of Integrated Watershed Management.

  19. Gracias.

  20. Ranking of sub-watersheds Conservation policy Compensatory approach. Weighted summation

  21. Ranking of municipalities Sustainable use policy Compensatory approach. Weighted summation

  22. Suitability assessment of the municipalities Relative importance among criteria. Conservation policy

  23. Suitability assessment of the municipalities Relative importance among criteria. Sustainable use policy

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