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strategies like prescribed burns are particularly susceptible to negative public opinions,
especially since they also perceived as relatively uncontrollable and unsafe (Fischer, 2011;
Paton, 2006).
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Those who consider wildland fires themselves to be an uncontrollable hazard
consequently believe that investments in wildfire mitigation are limited in their effectiveness or
even inconsequential (Winter & Fried, 2000). In addition, previous wildfire exposure can have
differing impacts on how an individual, or a community, perceives that risk. Previous exposure,
in the case of wildfires, can be interpreted as anything from a wildfire burning an individual's
property to having to evacuate from a proximate fire. Past literature indicates that the type of
impact and exactly how it affects the perception of that risk can vary greatly based on numerous
factors (Slovic 1987; Paton and Johnston, 2001). Exposure to wildfire can lead individuals to
believe that the risk is more frequent or probable and may lead them to make future decisions
regarding that risk based on the psychological stress experienced during or after exposure
(Martin et al., 2007). However, this may just be a short-term effect, meaning that over time the
influence of exposure on perception fades (Martin et al., 2007). Exposure to a disaster may also
lead to the hazard being perceived as out of the resident’s control, leading to them conducting
less mitigation measures and becoming more dependent on government or community
intervention (Gorte, 2013).
Hypotheses
The literature review revealed that social variables, place dependence, and risk perception
are all associated with wildfire mitigation. Ecological knowledge has been studied as a
determinant of mitigation in more recent literature, but missing from these studies is a look at
how WUI residents understand the human nature of wildfires. Collins (2008) suggests that future
studies should look at a WUI resident’s knowledge of how humans are partly to blame for the
current number of wildfires’ relationship with wildfire mitigation. If the WUI resident
understands the extent to which humans (and themselves) are responsible for the current amount
of exposure to wildfires (84% of ignitions are human-caused; Balch, Bradley, Abazoglu, Nagy,
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Fusco, & Mahood, 2017), it is reasonable to predict they will mitigate against the hazard. This
lead to the first hypothesis that I decided to test, that: wildfire mitigation will be related to
knowledge of the human nature of wildfires.
Anecdotal assumptions of a moral hazard problem within the WUI rely on the
assumption that WUI residents believe that the government is mostly, if not wholly responsible
for protecting their property from wildfires. However, past studies have indicated that residents
of the WUI have a strong sense of personal responsibility for protecting themselves and their
own property against wildfires (Winter and Fried, 2000). Because of this, I wanted to ask
whether WUI residents in my case study areas believed that government wildfire suppression
and mitigation measures enable them to live where they do, hypothesizing that WUI resident’s
opinion on whether government wildfire management measures enable their residence will
conduct more mitigation measures.
In studies focused on determinants of household risk mitigation in the WUI, generalizable
results across regions are hard to come by. Peer-reviewed articles have conducted quantitative
studies in the WUI of California (Collins, 2005), Arizona (Collins 2008), Michigan (Winter &
Fried, 2000), and Colorado (Brenkert-Smith et al., 2006; Martin et al., 2007). However, the cases
utilized in Colorado have focused on areas with strong homeowner’s associations or wildfire
safety prevention groups with high levels of community participation (Brenkert-Smith et al.,
2006). To have results that could be compared to other WUI studies, I will also be including the
following hypotheses: that social variables will be related to wildfire mitigation, place
dependency will be related to wildfire mitigation, and that risk perception will be related to
wildfire mitigation.
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Methods
To gain a better understanding of what variables influence frequency of mitigation, I
collected data through a household survey administered in Black Forest and Monument. I
developed a 21-question survey instrument to test my hypotheses (see appendix A), which also
included other possible determinants that would be related to wildfire mitigation. Over the course
of five days (Feb 17th,18th, 20th, 24th, and 25th), I administered surveys on a handheld tablet using
the Qualtrics online platform by going door to door in the WUI of the study communities; an
area determined utilizing maps from the Colorado State Forest Service (CSFS). I chose every 5th
house for attempted survey administration, however, many properties had either a fence with
gates or no trespassing signs, which often forced me to choose households more infrequently
than 1 in 5. A total of 104 surveys were administered in person. In my survey, I did not make the
distinction between Black Forest and Monument, instead including the two towns as a way to
include populations both with and without experience with wildfires, as Black Forest was
directly subject to a wildfire and Monument had only proximate exposure to some fires in the El
Paso County Area.
The Study Area
Colorado’s WUI (see Fig. 2; Radeloff et al., 2005) consists of roughly 6.6 million acres,
occurring disproportionately within the Front Range Region. The Front Range of Colorado
consists of 16 urban counties that span the eastern slope of the Rocky Mountains and is home to
more than 85% of Colorado’s population (Haas, Calkin, & Thompson, 2015). The Front Range
of Colorado has been experiencing population growth rates that have ranged from double to
triple national averages since the late 1980s, particularly in the WUI (Baron et al., 2000). This is
likely a result of the amenity-driven migration trends, facilitated by both an increase in
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environmental values, as well as access to emerging technical industries. Colorado shows a
strong correlation between certain amenity values, such as elevation change or forested area, and
growth rates in areas in proximity to those areas (McGranahan, 1999). The moderate fire regime
in the area consists of wildfires every 2-7 years, due to the ponderosa pine and prairie grass
habitats that are particularly well adapted to fire (Veblen et al., 2000). Decades of fire
suppression policies have led to denser stands of the ponderosa pine and Douglas fir, meaning
fires in the front range have a greater capacity to burn more intensely and spread to greater areas
(Graham, 2003).
Fig 2. Colorado’s WUI, with study area marked in black (Radeloff et al., 2005)
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I decided to focus my study area further to El Paso County (see Fig. 3; CSFS CO-Wrap),
which in contemporary wildfire impact models has the highest percentage of population exposed
to wildfires stemming from ignitions on federal lands compared to other Front Range counties
(Haas, Calkin, & Thompson 2015). This is most likely due to the combination of dense
residential developments surrounding Colorado Springs, along with a high concentration of
federal landholdings. The county contains portions of Pike and San Isabel National Forests,
along with several Department of Defense (DOD) properties, including the Air Force Academy
and Peterson Air Force Base. Fires ignited on DOD lands in El Paso County are predicted to
affect the greatest amount of people, taking into consideration that they border the residential
sprawl of Colorado Springs as well as containing their own inhabitants (Haas et al., 2015). The
area has also been subject to several of Colorado’s largest and most destructive wildfires in the
state’s history, including the 2002 Hayman Fire (55,750 ha burned, 600 structures destroyed), the
2012 Waldo Canyon Fire (7,384 ha burned, 346 structures destroyed; NIFC, 2017; Waldo
Canyon Fire Update, 2012), and the Black Forest Fire (5,780 ha burned, 511 structures
destroyed; NIFC 2017). The Hayman Fire was the largest fire by area in the state of Colorado,
and the Black Forest Fire is the most destructive fire by homes and value of structures destroyed.
Both the Hayman and Black Forest fires were the result of human ignitions. These fires occurred
during periods of dry and windy conditions, in areas with high fuel densities that facilitated quick
fire spread, conditions that are becoming increasingly common on the Front Range (Graham,
2003; Fire Data and Statistics, 2010 - 2017).
I wanted to sample areas that are representative of the WUI, while reflecting the
socioeconomic and ecological conditions of Colorado’s Front Range and El Paso County. I
further narrowed my study area to the communities of Monument and Black Forest, both located
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in the northern portion of the county. Due to Black Forest’s 2013 wildfire experience, Monument
was included as a way of getting survey responses from WUI residents without past wildfire
experience, which was predicted to influence mitigation. Monument, CO, is a town in the north
of El Paso County, with a population of 5,742, located 15 miles to the northwest of Black Forest
(U.S Census Bureau, 2012). Fire protection services in the area are provided by the Tri-Lakes
Monument Fire Protection District, which will provide fire mitigation home assessments in
concordance with federal Firewise guidelines at the homeowner’s request. Monument borders
large tracts of federal land, including the Pike and San Isabel National Forests, as well as having
Air Force Academy land nearby to the south.
Fig. 3: WUI of northern El Paso County with study areas highlighted retrieved from
https://www.coloradowildfirerisk.com/map/Public
Black Forest, CO Monument, CO
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Black Forest, CO is an unincorporated census-designated place (CDP) located in north of
Colorado Springs in El Paso County, with a population of 13,116 as of 2010 (U.S. Census
Bureau, 2012). Almost the entirety of Black Forest is considered WUI, and the vast majority of
the land is owned by private individuals. From June 11th to June 20th, 2013, Black Forest was
subject to the most destructive wildfire in the history of the State of Colorado. It burned 14,280
acres and 511 homes over its duration, and cost over 5.2 million dollars to suppress (STAFF,
2013). Not only was there significant damage to Black Forest’s human structures, but also to the
forests which the town's name was derived. Private forest owners experienced a significant loss
in both timber and amenity value on their properties, causing a significant temporary drop in real
estate values in the area. While the forested area in the community has significantly decreased,
the area is still wildland-urban interface that is at risk of wildland fire. Unlike Monument, Black
Forest does not border any large tracts of federal land, and as a result receives less attention from
federal land managers looking to perform or fund wildfire mitigation actions. However, Black
Forest’s majority-volunteer fire rescue has been particularly active in expanding and improving
its services. Most of the department’s funding comes from local taxpayer money, with
applications filed for matching grants when larger projects need to be undertaken or equipment
replaced. Black Forest also has a comprehensive community wildfire protection plan (CWPP),
which expands upon El Paso County’s CWPP for unincorporated places and includes more
proactive and comprehensive wildfire mitigation and prevention measures for homes located in
wooded areas.
Results
Out of the total surveys collected (n=104), only one was deemed unusable due to the
absence of almost all answers, leaving 103 total survey responses. Some questions utilized in the
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survey instrument were deemed unusable, which I describe in detail in discussion, as they
contained unusual and confusing wording. However, I found that most of the data was still
usable (See Table 1) for the purposes of testing my hypotheses. Both the descriptive statistics
and the chi-squared tests were conducted using the Qualtrics online platform, with the exception
of the median values, which were calculated using RStudio.
Table 1
Dependent and independent variables: Descriptive Statistics
M Mdn SD Range
Dependent Variables
Mitigation frequency 2.59 2 0.70 3
Independent Variables
Human Responsibility 2.74 3 0.67 3
Government Enable 3.78 4 1.24 4
Insurance Requires
Mitigation 1.84 2 0.74 2
Social Variables
Age 2.59 3 0.70 3
Retirement Status 2.40 3 0.80 2
Political Affiliation 2.31 2 0.65 2
Place Dependency
Local Employment 1.54 2 0.50 1
Residential Tenure 3.24 4 1.05 3
Tenure Type
(Own/Rent) 1.89 2 0.31 1
Perceived Risk
Perceived Risk 2.81 3 1.14 4
Concern about wildfires
endangering property 2.38 2 1.29 4
Past Exposure 1.61 2 0.58 2
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I utilized chi-squared tests of independence to determine whether relationships exist between the
individual variables and frequency of mitigation, since all variables in this study were
categorical. If necessary and possible, I merged columns and/or rows in the contingency table to
ensure that expected frequency counts were at least five in every cell to ensure the chi-squared
values were accurate. For all tests, a significance level of 0.05 was used to test the hypotheses.
H1) Wildfire mitigation will be related to knowledge of the human nature of wildfires
The chi-squared test of association indicates that the extent to which the respondents
believed humans are responsible for the current amount of exposure to wildfires is not
statistically associated (p=0.75) with the mitigation frequency (See Table 2). Worth noting is that
only one respondent surveyed believed that humans are not at all responsible for the current
amount of exposure to wildfires. As some expected values were less than five, the “not at all”
and “somewhat” columns were merged, along with the “mostly” and “completely” columns to
get a more accurate chi-squared value. However, this also did not yield statistically significant
results or a more accurate chi-squared value.
Table 2
Results of Chi-square Test and Descriptive Statistics for Mitigation Frequency by Human_Enable Extent to which humans are responsible for exposure to wildfires
Mitigation Frequency Not at all Somewhat Mostly Completely
Less than once a year 1 (100%) 19 (51.35%) 18 (34.62%) 3 (25.00%)
Once a year 0 (0.00%) 12 (32.43%) 13 (38.46%) 5 (41.67%)
Twice a year 0 (0.00%) 2 (5.41%) 3 (5.77%) 1 (8.33%)
More than twice a year 0 (0.00%) 4 (10.81%) 11 (21.15%) 3 (25.00%)
H2) WUI resident’s opinion on whether government wildfire management measures enable their
residence will conduct more mitigation measures
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The chi-squared test of association (see Table 3) indicates that respondent’s opinions on
the statement "Government wildfire mitigation and suppression measures enable me to live
where I do" and mitigation frequency were not statistically associated (p=0.49). Since some of
the expected frequencies were less than five, the chi-squared statistic may be inaccurate. To
remedy this, I merged the columns “strongly agree” with “somewhat agree”, and “strongly
disagree” with “somewhat disagree”, and the rows “twice a year” with “more than twice a year”,
along with “less than once a year” and “once a year”. However, this also did not yield an
accurate chi-squared value (1.09*) or statistically significant results (p=0.58) as expected
frequencies less than five remained.
Table 3
Results of Chi-square Test and Descriptive Statistics for Mitigation Frequency by Gov_Enable_Opinion "Government wildfire mitigation and suppression measures enable me to live
where I do"
Mitigation Frequency Strongly agree Somewhat
agree
Neither agree
nor disagree
Somewhat
disagree
Strongly
disagree
Less than once a year 0 (0.00%) 5 (29.41%) 11 (52.38%) 7 (43.75%) 16
(38.10%)
Once a year 2 (66.67%) 7 (41.18%) 5 (23.81%) 5 (31.25%) 19
(45.24%)
Twice a year 1 (33.33%) 1 (5.88%) 2 (9.52%) 1 (6.25%) 1 (2.38%)
More than twice a year 0 (0.00%) 4 (23.53%) 3 (14.29%) 3 (18.75%) 6 (14.29%)
Theobald, D. M., & Romme, W. H. (2007). Expansion of the US wildland–urban interface.
Landscape and Urban Planning, 83(4), 340-354.
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U.S. Census Bureau (2012). Colorado: 2010 Summary Population and Housing Characteristics
USDA [U.S. Department of Agriculture]. (1995). Course to the future: positioning fire and
aviation management. USDA Forest Service, Department of Fire and Aviation
Management, Washington, D.C., USA.
USDA [U.S. Department of Agriculture]. (2015). The Rising Cost of Wildfire Operations:
Effects on the Forest Service’s Non-Fire Work, (Washington, D.C.: Aug. 2015).
Veblen, T. T., Kitzberger, T., & Donnegan, J. (2000). Climatic and human influences on fire
regimes in ponderosa pine forests in the Colorado Front Range. Ecological Applications,
10(4), 1178-1195.
"Waldo Canyon Fire Update 6-30-12 Pm". InciWeb. Retrieved 2012-07-01.
Westerling, A. L., Hidalgo, H. G., Cayan, D. R., & Swetnam, T. W. (2006). Warming and earlier
spring increase western US forest wildfire activity. science, 313(5789), 940-943.
Winter, G., & Fried, J. S. (1997). Assessing the benefits of wildfire risk reduction: a Contingent
Valuation Approach. In Society of American Foresters. Convention (USA).
Winter, G., & Fried, J. S. (2000). Homeowner perspectives on fire hazard, responsibility, and
management strategies at the wildland-urban interface. Society & Natural Resources,
13(1), 33-49.
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Appendices
Appendix A: Survey Instrument
Survey Instrument (Implemented Through Qualtrics Online Service)
1. What is your age? 1= 18 to 34 years 2= 35 to 54 years 3= 55 to 74 years 4= 74 years and older
2. How long have you lived in your current community? 1= Less than 2 years 2= 3 to 5 years 3= 6 to 10 years 4= More than 10 years 3. Do you own or rent the place where you live? 1= Rent 2= Own/Bought 4. What race or ethnicity do you consider yourself? 1= White, Caucasian, or European 2= Hispanic, Mexican-American, or Latino 3= Asian or Pacific Islander 4= Black or African American 5= Native American 6= Other: (Fill In) 5. Are all adults in your household retired? 1= Retired 2= Not retired 6. Is your or anyone in your household’s place of work in the same community that you live or reside in? (If retired/unemployed, please answer no)
1= Yes 2= No
7. What was your household’s average income over the past 12 months (before taxes)? 1= Less than $25,000 2= $25,000 to $34,999 3= $35,000 to $49,999 4= $50,000 to $74,999 5= $75,000 to $99,999 6= $100,000 to $149,999 7= $150,000 to $199,999 8= $200,000 or more 8. In politics today, do you consider yourself a:
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1= Democrat 2= Republican 3= Independent 4= Other 9. Have any of your current or past residences been exposed to a wildfire? 1= Yes 2= No 3= Unsure For the purposes of this survey, a wildfire mitigation action is any action taken by an individual or community that is aimed at lowering the risk of wildfire on their property or in their community. These actions can be done before, during, or after a wildfire. This includes actions like mechanical brush removal, constructing a fire line, or a prescribed burn. 9. In the event of a small localized wildfire, do you believe community firefighting resources will be sufficient to prevent any damage to your property? 1= Yes 2= No 3= Unsure 10. Does your household insurance company require you to take wildfire mitigation measures on your property? 1= Yes 2= No 3= Unsure 11. To your knowledge, what level of formal or informal government ultimately pays for the majority of fire suppression and mitigation? 1= Federal (United States Forest Service, Department of Interior, etc.) 2= State (Colorado State Forest Service, etc.) 3= Local (Municipal Fire Departments)
4= Local Informal (Community fire organizations, Homeowners associations, etc.) 5= Other (Please Specify)
12. In your opinion, what level of formal or informal government do you believe should pay for the majority of fire suppression and mitigation? 1= Federal (United States Forest Service, Department of Interior, etc.) 2= State (Colorado State Forest Service, etc.) 3= Local (Municipal Fire Departments)
4= Local Informal (Community fire organizations, Homeowners associations, etc.) 5= Other (Please Specify)
13. How often do you conduct or pay for fire mitigation measures, of any type, on your own property? 1= Less than once a year 2= Once a year 3= Twice a year 4= More than Twice a year
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14. Has your household donated or participated in community wildfire prevention groups or programs, such as those with Firewise certifications? 1= Yes 2= No 3= Unsure 15. On a scale of 1-5, To what extent are humans responsible for the current amount of exposure to wildfires? (With 1 being entirely human and 5 being entirely natural) (1-5) 16. On a scale of 1-5, with 1 representing low risk and 5 being the high risk, how at risk do you believe your home is from wildfire?
(1-5) The following section will consist of several statements, which you can choose to agree or disagree with on the following scale:
Strongly Disagree Disagree
Neutral / Undecided Agree
Strongly Agree
17. “I am concerned about wildfires endangering my property” 18. “It is primarily my responsibility to conduct wildfire mitigation measures for my property” 19. “It is primarily the government’s responsibility to conduct fire mitigation measures for my community” 20. “Government wildfire mitigation and suppression measures enable me to live where I do” 21. “It is primarily my community’s responsibility to conduct fire mitigation measures in my community”