How Many Visitors is Too Many at Arches?. Problem: trampling of fragile soils and vegetation...
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How Many Visitors is Too Many at Arches?
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How Many Visitors is Too Many at Arches?
•Problem: trampling of fragile soils and vegetation (microbiotic soil crust); crowding
•Strategies: limit use; reduce the impact of use•Practices: zoning; information/education; facility
development/site design/maintenance; law enforcement; rationing/allocation
•Carrying capacity/Visitor Experience and Resource Protection (VERP)
•Two-fold mission of NPS• Increasing use of national parks/Arches National
Park•Arches National Park•Delicate Arch
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How Many Visitors is Too Many at Arches?
•Ed Abbey•Program of research
▫Indicator of quality: crowding▫Standard of quality: maximum acceptable
level of use (people at one time (PAOT))•Sizing of parking lots/parking regulations•Permit systems for other areas• Information/education: Web site; park
newspaper; film; signs; Visitor Center; interpretive programs; Facebook and Twitter
•Signs and fencing along trails•Monitoring
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1. Formulate management objectives and associated indicators and standards of quality.
2. Monitor indicators of quality.
3. Implement management practices to maintain standards of quality.
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Optimal or Preferred Condition
-4
-3
-2
-1
0
1
2
3
4
0 2 4 6 8 10 12 14 16 18 20
Number of Groups Encountered Along A Trail Per Day
Accep
tab
ilit
y
Range of Acceptable Conditions
Nor
m In
tens
ity o
r S
alie
nce
Minimum Acceptable Condition
Crystallization (Dispersionaround points defining the norm curve)
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0 5 7 12 15 21 22 26 36 45 52 63 66 68 78 108-4
-3
-2
-1
0
1
2
3
4
People at One Time (PAOT)
Acc
epta
bil
ity
Rat
ing
Social Norm Curve for Delicate Arch