Soils 350 Notes

Lecture I


American Planning Association

Soil and Land use planning

  1. Planning is defining the objectives established on the based of a problem analysis There are various physical-biological social , cultural., financial, and political constraints

There are techniques for carrying out the alternative technical management activities.

2. Planning requires organizing, analyzing and integrating objectives, constraints and techniques to maximize the use of resources

3. Management activities are undertaken to produce benefits to people

People plant trees to obtain benefits such as reduced soil loss, improved recreation

opportunities . People do not plant trees an objective in itself

4. Steps in planning  see full document

1. monitoring and evaluating past activities and identifying problems and opportunities

a. Land fill is filling up will be out of room in 1 year

2. Determine the main characteristics of the problems and opportunities identified, , define constraints and objectives necessary to overcome the problem

b. new land fill

1. people don't like land fills near them

2. dumps contaminate water and air

3. soil at certain locations not suitable

4. ground water at certain locations to near surface

3. Identify alternative actions to implement strategies within the defined constraints.

1. do nothing( does not satisfy constraints)

2. locate a new land fill

3. stop producing waste

4. decrease waste to make exits land fill last longer

4. Appraising and evaluating the impacts of alternatives, including environmental, social and economic effects and assess uncertainty associated with the results.

1. Locate on west mesa evaluate

2. locate in valley evaluate

3. located on east mesa evaluate

5. Ranking the alternatives and recommend actions when recommendations are


1. - west mesa best

2. east mesa ok

3. valley not ok (explain why)

5. Planning is an iterative process rapid, low-cost assessment to more detailed design an appraisal stages until have all the desired affordable information need to make a decision

6. Planning has to start some where and so starting planning process with monitoring.monitoring includes climatology, soils, vegetation and hydrology and population projection Las Cruces project to double in next 20 years

7. Long term monitoring. needed to determine information about drought, soil erosion conditions and flooding potentials

8. Problems can come not only from monitoring but from one time observation- silting of a reservoir or scars of erosion

9 Objectives can be non-production objectives such as enhancing scenic beauty or maintaining wildlife habitats. Objective to set aside land as a reserve-what type of land is best suited for this

10. Setting objectives means developing a series of objective functions and then defining a common way to value them and then maximize the benefits for the inputs . Assign monetary value and then use linear or dynamic programming to maximize function

I 1. Identify constraints land form and soils can be such that only certain type of changes in land use practices would have a good chance of success in the area.

Cultural constraints may stand in the way of changing land use management practices Financing mechanism may be a limiting factor to land use change.

Political structure can be such that effective regulation and enforcement of the land use plan would be difficult.

12. Design of alternatives to implement the strategy means identifying the various actions which can be used to implement the strategy to produce the desired results . Type of water treatment plant vs land use. Lagon vs physical water treatment plant. Is soil type suitable for a lagon

13. Integration of perspectives of users and technical personnel is the key to successful planning

Table 1 page 18

14. Risk and Uncertainty

evaluate objective function using different assumption concerning the value of key parameters