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Environmental Energy and Economic Research (2017) 1(3):287-298
DOI 10.22097/eeer.2017.86996.1005
Socioeconomic Impact Assessment of Deforestation of Hyrcanian
Forests on Local Communities
Sahar Rezaiana*, Seyed Ali Jozib
a Department of Environment, Islamic Azad University, Shahrood Branch, Shahrood, Iran b Department of Environment, Islamic Azad University, North Tehran Branch, Tehran, Iran
Received: 9 January 2017 /Accepted: 19 May 2017
Abstract
The present study was conducted to assess socio-economic impacts of deforestation of
hyrcanian forests in two basins of Do-Hezar and Se-Hezar, northern Iran. To this end,
changes in the forest area were detected over the period between 1990 and 2006. This was
done by land use land cover maps, prepared from Landsat and IRS satellite images. The land
use changes were investigated by enhancement of the images at each time interval.
Furthermore, Normalized Difference Vegetation Index (NDVI) was also used to evaluate the
density of the land cover in the form of six greenness classes. Subsequently, the
socioeconomic impacts of deforestation in the basins were estimated using rapid assessment
matrix. Depending on the extent of destruction, the socioeconomic parameters affected by
destroyed or decreased forest area were identified and scored by RIAM Software. The
obtained results indicated that the greatest changes in forest area was occurred due to urban
development and expanded farmland areas over the years between 2000 and 2006, when the
greenness degree was also decreased. Acceding to the RIAM results, 3% of the deforestation
impacts in two basins was very negative (-E) and 23% was moderately negative (-c). Besides,
slightly negative (-A) impacts included 27% of the total negative effects. Although the
adverse effects of deforestation on socioeconomic status of the residents were not very
destructive, however, the impacts on the rural community could be important and noticeable.
Keywords: Socioeconomic impacts, Land use, Remote sensing, Rapid impact assessment
matrix, Deforestation.
Introduction
Due to the unique natural conditions of the local environment, hyrcanian forests in northern
Iran have long been a place for human habitation in the form of forest villages. The cultural
characteristics of people within or adjacent to the forests are somehow derived from the
conditions of their living environment. Human manipulation and exploitation of the fragile
ecosystem services of the hyrcanian forests has led to severe damages (Zarandian et al. 2016;
Akhani et al. 2010; Yousefpoor et al. 2016). These damages could be detected over time by
the use of change detection methods (Tajbakhsh et al. 2016; Azizi et al. 2016; Afshar et al.
2016). Different techniques and conceptual approaches have yet been proposed in many
* Corresponding Author Email: [email protected]
288 Rezaian and Jozi
studies worldwide for change detection of forest area. As such, Tian et al. (2013) developed a
novel region-based method for change detection using space borne panchromatic Cartosat-1
stereo imagery. They concluded that the proposed method well suited for Cartosat-1 imagery,
and the obtained height values can largely improve the change detection accuracy. In a
research by Pahari et al. (1999), future deforestation and total forest loss in the world was
predicted with regard to the growing rate of global population. According to their reports,
tropical and Sahelian Africa, Central America, Tropical Asia, and Tropical Latin America will
be the countries with the highest rate of deforestation by the year 2050. Panta et al. (2008)
used artificial neural network and Landsat images to analyze forest degradation and
deforestation trends in Chitwan District in Nepal, where there are several key habitats for
wildlife species. In another research, Robert et al. (2007) used the dense temporal stack of
Landsat Thematic Mapper (TM) imagery to develop a new model for change detection of
forest areas. They evaluated the accuracy of the proposed change detection method as 90%.
Baudouin et al. (2007) performed the change detection analysis of forest areas based on the
high resolution satellite images. Gartner et al. (2014), using the data from QuickBird (2005)
and WorldView2 (2011) as well as the object based change detection method, observed
changes in Populus euphratica trees over time. Bin et al. (2013) suggested illumination
correction algorithm to improve the accuracy of forest change detection by Landsat-derived
reflectance data. Desheng et al. (2008) proposed the use of spatial-temporal Markov Random
Fields (MRF) models to improve the accuracy of change detection results. Yuan et al. (2008)
used Li-Strahler geometric-optical model for change detection of forest land cover in Three
Gorges region, China.
The primary aim of the present study was to investigate changes in forest area and other
land use land cover classes in Do-Hezar and Se-Hezar basins based on remotely-sensed data
and over the period of 1990-2006. As the secondary goal, the socioeconomic impacts of
deforestation of hyrcanian forests at these basins were also studied.
Material and Methods
Study area
The study area (Do-Hezar and Se-Hezar Basins) is located in the northern Iran and at the
southern fringe of the Caspian Sea in Mazandaran Province, over the eastern longitude range
of 50°31'43" to 50°58'41" and the northern latitude range of 36°19'22" to 36°45'25". The
study area is extended over the approximate area of 77,443 ha, from which about 31,751 ha
are covered by hyrcanian forests and about 42,033 ha by rangelands. Agricultural and
horticultural lands occupy about 546 ha of the whole study area. The minimum altitude of the
study area is about 100 m from sea level and maximum altitude is about 4800 m at the peaks
of Alam Kooh and Takhteh Soleiman mountains. The basins are divided into 17 hydrological
units, each with 8 sub-basins along with a common sub-basin (multipurpose report of Forestry
Master Plan for basins 33 and 34, Tonekabon, Forests, Range and Watershed Management
Organization, 2006). Figure 1 depicts the divisions of the Do-Hezar and Se-Hezar basins.
Research procedure
In order to analyze the process of deforestation, as the main objective of the present study, the
satellite images of the study area in three time periods, including Landsat TM 1990, Landsat
ETM 2000, and IRS 2006, were used. The data was analyzed by ILWIS, IDRISI, ERDAS,
ArcGIS, Excel, and RIAM software. Before preparing the land use land cover maps of the
river basins, the satellite images were preprocessed. The preprocessing operations included
Environmental Energy and Economic Research (2017) 1(3):287-298 289
relative radiometric correction (RRC), modulation transfer function compensation (MTFC),
and geo-correction (GC) (Fang et al., 2014). Then, Chavez Method was used to perform
atmospheric corrections (reducing numerical value of dark pixels). This technique promotes
the accuracy of classifications on satellite images. The images used in this study did not
require atmospheric correction. For geometric correction of the images, they were imported
into the ERDAS software.
Figure 1. Location of hyrcanian forests in Do-Hezar and Se-Hezar Basins
Afterwards, the images were geo-referenced using Resampling Function of the software
and by the control points well distributed throughout the study area and based on the first
nearest neighbor method. The processing stage was initiated by the assortment of the satellite
images. In digital satellite imagery remote sensing, each pixel has its own numerical value,
which reflects the spectral behavior of the corresponding phenomenon on the Earth’s surface
(Ghulam 2010; Kotthaus et al. 2014; Liang 2004; Weng 2007). The separation of similar
spectra on the satellite images is known as satellite data classification (Dalponte et al., 2012).
Classification of satellite images is possible through two classification methods of supervised
and unsupervised (Mohammady et al., 2015; Nagarajan and Basil, 2014; Rahimi 2016;
Ayalew Mengistu et al. 2011). For supervised classification of pixels, ground training points
are necessary (Malmir et al., 2015; Ganguly et al. 2016; Berakhi et al. 2014; Sewnet 2016).
In this study, different land use classes were intended to separate as various polygons on
the satellite images. These polygons require their own training points, already identified based
on field studies, field sampling, and GPS software. After introducing the training points to the
software, different land use types were separated on the satellite images using maximum
likelihood method in ERDAS software. Accordingly, the land use land cover maps of the
river basins in three time intervals of 1990, 2000, and 2006 were prepared. The prepared land
290 Rezaian and Jozi
use land cover maps were then cross-tabulated to detect the changes in the area of each land
use type over the study period.
It should be mentioned that in the post-processing step, the accuracy of the classifications
was checked by randomly-selected sample points in the river basins and IDRISI software. In
addition, NDVI (Normalized Difference Vegetation Index) was used to check the greenness
status of the region during 1990 to 2006 in ILWIS software. Accordingly, NDVI was obtained
in the desired bands of IRS, TM, and ETM images. Then, the land cover of the study area was
classified into 6 classes (no land cover, very poor land cover, poor land cover, fair land cover,
good land cover, and very good land cover). This was done by the method of threshold
densities. Figure 2 depicts the classification of vegetation density on the satellite images of
the year 2000, performed through slicing method (threshold densities) and image histogram
curve in ILWIS software.
Figure 2. Classification of vegetation density on the satellite images using histogram curve
After detecting the spatiotemporal changes of different land use types and vegetation cover in
the study area, the method of Rapid Impact Assessment Matrix (RIAM) was used to evaluate
the socioeconomic effects of the detected changes. RIAM consists of four components,
including physical/chemical, biological/ecological, social/cultural, and economic/operational
(Araujo et al., 2005). The process of RIAM method is summarized in the following equation
(Eq. 1).
a1 × a2 = aT (1)
b1 + b2 + b3 = bT
aT × bT = ES
Where; aT and bT are respectively the multiplication products of all A and all B scores, and
ES is the environmental score for the current conditions.
Figure 3 shows the process of the present study.
Environmental Energy and Economic Research (2017) 1(3):287-298 291
Figure 3. procedure of the present research
Result and Discussion
The results of this study showed that the area of both forest areas kept a declining trend
during 1990 to 2006. Most of the reduction in the forest lands was occurred during 2000 to
2006. In addition, settlements and agricultural lands showed an increase in both basins from
1990 to 2006, representing extensive land use changes in these years. The greatest changes
belong to the residential land use, occurred during 2006-2000. The area of the agricultural
lands had a declining trend during 1990-2000, while then; it notably increased during 2000-
2006. Comparing the rangeland areas of the basins during 1990-2000 showed an increasing
trend; this could be due to conversion of forest areas to rangelands in the upstream areas,
while the area of rangeland decreased during 2000-2006. Figure 4 shows the changes in
residential, agricultural, forest, rangeland, and water land use land cover classes during three
intervals of 1990, 2000, and 2006.
As the Figure 4 suggests, rangeland and forest areas include majority of both basins. For
accuracy assessment of the maps, it is required to compare them pixel by pixel with the
ground truth points. After classification of the satellite images, some training points were
positioned by GPS to assess the accuracy of the maps and to control the results. Table 1
shows the accuracy of the classifications.
The results showed that conversion of forest lands to residential areas accelerated during
1990-2000 which was due to the construction of villas in the region. Also, conversion of
forest areas to agricultural lands increased in the period of 1990-2006. During 1990-2000 and
2000-2006 periods, 21% and 27% of the forest areas in both basins were converted into r
rangelands. Conversion of agricultural land to residential areas in both basins doubled from
6% to about 12% during 1990-2006. At this period, the changing trend of rangelands to
residential areas fell from 28% down to 17%. In other words, during the 16-year period,
292 Rezaian and Jozi
conversion of rangeland areas to agricultural lands has declined from 14% to 4% in both
basins. Based on the results, the value of NDVI in the basins ranged from 17% (minimum) to
62% (maximum) in 1990. This means that areas with rich land cover were in adjacent to the
areas with spare land cover in both basins. The NDVI map of the basins in 2000 indicated a
range between a minimum of 35% and a maximum of 50%, indicating normal vegetation
status in both basins.
Figure 4. Land use land cover maps of Do-Hezar and Se-Hezar basins in 1999, 2000, and
2006
Table1: Accuracy assessment of the prepared land use land cover maps
Classification accuracy Date and type of satellite image
0. 82 TM/1990
0. 80 ETM/2000
0. 78 IRS/2006
The results of 2006 showed the minimum change as 15% and the maximum change as
58%, indicating areas with rich and dense vegetation cover beside vegetation-free areas. The
NDVI status showed that no cover, very poor cover, and poor cover classes increased in the
period of 1990-2006. Most NDVI changes occurred during 1990-2000, which correspond to
accelerated land use land cover changes in this period. Figure 5 provides a comparison on the
greenness extent of both basins in three time periods.
Environmental Energy and Economic Research (2017) 1(3):287-298 293
Figure 5. Comparison of greening coverage in two basins in 2006
As the greenness degree of the basins shows, the quality of land cover in fair and good
classes was desirable in 1990, while in 2000, the area of spare land cover class was expanded
more than the other vegetation cover classes. This was due to the conversion of very poor,
poor, and fair land cover classes to spare land cover. In 2006, the area of very poor and fair
land cover classes was greater than the other classes and the area of good land cover was the
smallest. Also, there was found no patches of very good land cover in both basins. Figure 6
depicts the extent of land cover greenness in the two basins during three time intervals of
1990, 2000, and 2006. As observed, the density of vegetation cover declined in the period
between 1990 and 2006. This is more evident in the time period of 1990-2000.
In this paper, for socioeconomic impact assessment of the deforestation, first of all,
satellite images were used to map the current land use and the trend of land use land cover
changes. In a similar study, Siddiqui et al., (2004) prepared the map of a forest area using
ETM satellite images. They also used logistic regression model to predict the spatial pattern
of deforestation and to find possible reasons of this deterioration.
The results of the present study revealed a declining trend in the area of hyrcanian forests
in the basins. On the contrary, the area of rangelands increased from 46490 ha in 1990 to
499369 ha in 2000, which could be due to degradation of forest land cover in the upstream
areas and its conversion to rangeland. However, the area of rangelands decreased to 43576ha
in 2006. The area of agricultural fields and residential lands increased during 1990-2006. This
was mainly due to conversion of rangelands to built-up areas, as a result of extensive
unplanned urban development , particularly during the period of 2000-2006.
The socioeconomic impact assessment of land degradation in the study area showed that
loss of hyrcanian forests is the most important adverse effect of land use changes over the
study period, which is attributed to the dependence of the livelihood of the local communities
to these forests.
Figure 7 illustrates the scores of possible socioeconomic effects of land use changes in the
study area over the study period. It should be mentioned that A to E letters indicate the degree
of effects on the receiving environment, ranging from slight effect (A) to considerable effect
(E). The positive and negative nature of the effects is shown by + and – symptoms.
Reviewing the flooding records revealed a return period of 20 to 50 years in both basins.
This would be a serious threat to the dense residential and commercial areas, and livelihood of
local communities, as well as animal husbandry and farmers, especially in villages located on
the floodways. In the event of flooding, majority of the farmlands will be flooded and
consequently, the farmlands will gradually convert into the barren lands due to loss of soil
fertility and top soil.
No cover Very poor poor Moderate Good Very good
0
10000
20000
30000
40000
50000
60000
The green
degree of
year 1990The green
degree of
year 2000The green
degree of
year 2006
294 Rezaian and Jozi
Figure 6. vegetation density of Do-Hezar and Se-Hezar Basins in 1990, 2000, and 2006
Socioeconomic effects
Environmental Energy and Economic Research (2017) 1(3):287-298 295
Sociocultural (SC) analysis of land degradation showed that alignment with macro policies,
with a score of -81, would be very negative impact (-E) of land use change in the study area.
Furthermore, tourism decline, increased flooding, reduced aesthetic quality, and landscape
quality, with the score range of -19 to -39, would be the most important moderately negative
effects (-C) of conversion of land use. In addition, reduced local population, increased
immigration, declining health indicators, increased disease, reduced quality of drinking water,
culture invasion, indiscriminate constructions, and poor quality of groundwater, with a total
score ranges between -10 and -18, are the most important negative changes (-B) imposed by
land use change. Other parameters (literacy, education, population displacement, public
participation, educational facilities, roads and transport, as well as cultural, historical, and
archaeological heritage, and traffic), with a score range of -1 to -9 will be slightly affected (-
A) by the deforestation, which could be neglected. Among economic/operational (EO),
employment, income, livestock, and real estate value will be moderately affected (-C) by
deforestation. In addition, negative impact (-B) is expected to impose on agriculture, local
land use, community services, future development plans, new infrastructures, aquaculture,
and revenue from the sale of timber. Slight negative effects (-A), but negligible, are also
expected on health services, beekeeping, and handicrafts. According to the results, the
negative effects of deforestation in the social/cultural parameters are greater than
economic/operational parameters. The results also showed that 3% of the impacts were very
negative (-E), 23% moderately negative (-C), 37% negative (-B), and 27% slightly negative
and negligible (-A). In addition, no significant adverse effect (-D) is expected to impose on
any social/cultural and economic parameters in the two basins. The very negative impacts (-E)
of deforestation, in comparison to negative impacts (-B) and moderately negative impacts (-
C), was very limited in both basins. Therefore, this impact cannot be considered destructive
and significant in the socioeconomic section in the basins.
Conclusion
The research findings revealed a declining trend of Hyrcanian forest over the study period
from 1990 to 2006. In addition, residential areas and agricultural lands were expanded in both
basins from 1990 to 2006. The increasing trend of rangeland areas could be attributed to
conversion of forest areas in the upstream areas. According to the results of RIAM, the major
negative socio-cultural and economic impacts of forest degradation in both basins include
tourism decline, increased risk of flooding, declined aesthetic quality, loss of landscape
quality, unemployment, lower income of residents, lower value of real estates, and reducing
animal husbandry. Accordingly, it would be of utmost importance to conserve natural
ecosystem of the hyrcanian forests in order to conserve tourist destinations and increase the
income of local communities. Do-Hezar and Se-Hezar Basins in Tonkabon City have a good
potential for ecotourism development due to its exquisite scenery, unique landscapes, rivers,
castles, and mountains.
Land use changes in the past three decades, particularly conversion of forest land cover to
rangelands and farmlands, have increased the risk of flooding of farmlands in the study area.
Therefore, the saturated fertile top-soil will be washed; its fertility will be lost, and gradually
converted into barren lands. This will affect the income of local communities, whose
livelihood absolutely depends on forest, farming, and animal husbandry.
Among the negative effects of deforestation in these basins can be mentioned to
immigration, population displacement, reduction of public participation, poor social welfare
(educational, health, and transport facilities) and social services, declined health indicators,
and poor quality of drinking water.
296 Rezaian and Jozi
Figure 7. Environmental and socio-economic effects of land use land cover changes in the
study area.
According to the research findings, deforestation will leave no significant socioeconomic
on none of the basins; however, the role of Do-Hezar and Se-Hezar beautiful and rich forests
in the livelihood of the residents cannot be ignored. Given the potentials of the region, the
source of income for a rural family varies in both basins and includes a variety of sources
such as agricultural activities, livestock, services, labor, handicrafts, and other jobs. However,
several factors constitute household income in most rural families; for example, a family may
be a farmer or a herder, and also a handcrafter. Due to the low income of the local
communities, the head of household has to earn revenue from redouble efforts. In this context,
a comprehensive and dynamic management can help identifying the potentials of local
0
1
2
3
4
5
6
7
8
-E -D -C -B -A N A B C D E
Nu
mb
er
of
eff
ect
s
Effects range
Socio-cultual effect
0
1
2
3
4
5
6
7
8
-E -D -C -B -A N A B C D E
Nu
mb
er
of
eff
ect
s
Range of effects
Economic-executive effect
0
5
10
15
-E -D -C -B -A N A B C D E
Nu
mb
er
of
eff
ect
s
Range of effects
Socio-cultual effect Economic-executive effect
Environmental Energy and Economic Research (2017) 1(3):287-298 297
environment in order to find new ways of livelihood for the locals in a way to leave the least
possible adverse effects on the environment while securing the income of local communities.
In this respect, attempts should be made towards conservation of ecosystem services. Among
suitable measures should be preventing the trafficking of timber in the forest. Establishment
of multipurpose cooperatives with members from local communities, replacement of
traditional husbandry with semi-industrial animal husbandry units, assistance to self-
sufficiency of local communities by granting loans with low interest rates, rehabilitation of
native industry, establishment of small breweries for dairy products, supporting beekeeping,
silk rearing, poultry, and traditional handicrafts, providing opportunities for development of
ecotourism and increasing social welfare of local communities could be among other
measures recommended.
Acknowledgement
The authors hereby would like to express their sincere gratitude to the staff of Iran Forests,
Range and Watershed Management Organization for providing them with the input data.
Special thanks to all who have contributed in the present study.
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