Page 98 - JCAU-6-3

Journal of Chinese
Architecture and Urbanism Influence of land-use change on carbon storage

et al., 2022), especially the increasing expansion of urban distribution pattern of carbon storage and exploring the
boundaries, which has had a prominent impact on the impacts of urban spatial development strategy, urban-rural
regional ecological environment, such as the heat island integration planning, and ecological green-belt construction
effect and air pollution (Nolon et al., 2013; Powers & on carbon storage in the urban ecosystem. This study is
Jetz, 2019). Land use and cover change (LUCC) affect the expected to provide case references for socioeconomic
processes of material circulation and energy exchange in development, ecological civilization construction, territorial
the hydrosphere, pedosphere, atmosphere, and biosphere spatial planning, and land use and management of megacities,
(Houet et al., 2010), and they determine the carbon storage aiming to achieve carbon emissions peaking and carbon
of terrestrial ecosystems (Foley et al., 2005; Liu et al., 2011; neutrality (Wang & Shao, 2023).
Samat et al., 2011; Zaehle et al., 2007).
The influence mechanism of land use on carbon storage 2. Methods
has been widely studied (Rajput et al., 2017). Most studies 2.1. Study area
have been carried out on a large scale, such as provincial, A substantial proportion of Chengdu is located in the
river basin, and mountainous areas and have shown Chengdu Plain in the western part of the Sichuan Basin.
spatial heterogeneity and complexity (Feng et al., 2020; The terrain slopes from northeast to southwest (Figure 1),
Wu et al., 2016). However, there is little research focused forming a unique geomorphological feature where plains,
on economically developed municipal units (Yang et al., hills, and mountains each account for one-third of the area
2024). As a matter of fact, studying the changes in carbon (Peng et al., 2011). In May 2016, the county-level city of
sinks in urban units and understanding the potential and Jianyang was placed under the jurisdiction of Chengdu,
limitations of carbon sinks in different urban units can expanding the administrative area of Chengdu from
guide urban planners and managers to lay out urban land 12121.28 ha to 143397.749 ha. In 2017, Chengdu launched
structures more scientifically. This is of great significance in a new urban planning initiative, with Longquan Mountain
finding effective ways to reduce greenhouse gas emissions as the central axis, forming a spatial layout model of “One
and mitigate climate warming.
Mountain with Two Wings.”
In recent years, under the guidance of the strategy of
ecological civilization and the goal of building a beautiful 2.2. Data source
China, the country has actively pursued the policy objectives In this study, land-use data for Chengdu in 2010, 2015, and
of carbon peak and carbon neutrality. As a national central 2020 were selected as the basic data. The statistical data for
city in the southwest region of China, Chengdu, along with these 3 years were aligned with the three consecutive 5-year
Chongqing, has jointly formed “The Fourth Peak,” leading plans for national economic and social development,
China’s economic growth. Concurrently, Chengdu has put allowing us to illustrate the effects of these plans on land
forward the strategy of building a “Park City,” constantly use and urban development initiatives. Digital elevation
coordinating ecological and economic development. model data and LUCC remote sensing images with a
Investigating changes in land use and regional carbon storage resolution of 30 m, and administrative boundary data of
is necessary to evaluate the efficacy and intended contribution Chengdu were obtained from the Chinese Academy of
of carbon neutrality (Qing et al., 2022). However, studies Sciences (CAS) (http://www.resdc.cn). According to the
on carbon storage changes in Chengdu have primarily remote sensing supervision and classification standard
focused on soil carbon density, vegetation, and carbon of CAS, the overall terrain classification accuracy is over
storage in single terrestrial ecosystems such as forests and 80%. Using the ArcGIS reclassification tool, 18 types of
wetlands (Cunha et al., 2015; Liu et al., 2018; Ngo et al., 2015; land use in Chengdu were reclassified into six primary
Takahashi et al., 2015). Few studies have considered changes land classes, including cultivated land, forest, grassland,
in carbon sinks caused by land use. Many researchers have wetland, construction land, and unused land (Ben & Yu,
successfully applied the Integrated Valuation of Ecosystem 2022; Wang et al., 2019). Through multiple simulations and
Services and Trade-offs (InVEST) model to analyze carbon debugging after the unification of projection, coordinate
storage in various environments, including mountainous system, and resolution, the resolution was finally unified to
areas (Shen et al., 2018; Xia et al., 2020), plateaus (Liu et al., 30 m × 30 m using the resampling function.
2021), and river basins (Yang et al., 2021), with finding that
the implementation of ecological protection and ecological 2.3. Calculations and assessments
engineering can effectively control the reduction of carbon
storage (Deng et al., 2020; Wei et al., 2017; Zhang et al., 2022). 2.3.1. Calculation of carbon storage
In this study, we analyze the land-use change in Chengdu The InVEST model (Sharp et al., 2020; Wu et al., 2023) was
from 2010 to 2020, revealing the spatial and temporal introduced to calculate carbon storage. The carbon storage

Volume 6 Issue 3 (2024) 2 https://doi.org/10.36922/jcau.3069