Page 99 - JCAU-5-2

Journal of Chinese
Architecture and Urbanism Study on ecosystem service value in Wuhan

nationwide to participate in field surveys on a plot-by-plot regulation, environmental purification, hydrological
basis. Thus, this method ensures that the database was regulation, soil retention, nutrient cycling, biodiversity
authoritative, accurate, and intact. conservation, and esthetic landscape. According to the
In the study, we divided the land based on six types of types and attributes of different evaluation indexes of
land use, such as cultivated land, forestry area, grassland, ecosystem in Wuhan, the market value method, shadow
water body, built-up land, and unused land. Due to the project method, alternative project method, and travel cost
large water area and high ESV of water bodies in Wuhan, method were mainly applied to evaluate the ESV of Wuhan.
the study subdivided water bodies into two subcategories: To eliminate the impact of inflation, the study adopted
rivers/lakes and wetland. It was the first time that such data the corrected consumer value index (CPI) of residents to
were used for research in the ESV assessment at an urban adjust the price to 2018 to make the results comparable.
scale in China. The specific formulas and processes used to estimate the
ESV in Wuhan are shown in Table 1.
2.2.2. Socioeconomic data
2.4.1. Agricultural production
The socioeconomic data were largely sourced from
statistical data. The total value of agricultural products, Nature provides renewable biotic resources and
population, GDP, and other social and economic data non-renewable abiotic resources. Generally, production
sets were sourced from Wuhan statistical yearbooks. To functions are limited to renewable biotic resources, the
enhance comparability, the economic data in 1996, 2000, so-called “agricultural products,” including “forest products”
2005, 2010, 2015 were converted to 2018 benchmark. (e.g., fruits, leaves), “other agricultural products” (e.g., rice
and corn), and “aquatic products” (e.g., fish, shrimp). The
2.2.3. Natural resources data values of production functions were evaluated by market
price method (Miu et al., 2016). The formula is as follows:
Natural resources data mainly pertain to the natural
environment and biological conditions. The natural V= ∑ M × P i (II)
p
i
environment conditions included soil, water, and
climatic conditions. Biological conditions are concerning
vegetation, aquatic organisms, and ecosystem types. Water Where V is the total value of agricultural products; M i
p
resources data were obtained from Wuhan Water Affairs is the annual output of the i-th agricultural products (kg);
Bureau and Wuhan Lake Bureau. Climatic data, including and P is the price of this agricultural product in that year
i
annual precipitation and mean temperature from 1996 to (yuan/kg).
2018, were downloaded from China Meteorological Data Based on the land use data and statistical yearbook
Sharing Service System. Others were sourced from related (Wuhan Statistics Bureau, 1997, 2001, 2006, 2011, 2016,
databases and literature. 2019), the value of agricultural product can be obtained.
2.3. Analysis of land use change 2.4.2. Water supply
Single land use dynamic degree was used to reveal the The water supply function focuses primarily on the
changes of a certain land use type in the study area over capacity of water storage, and the ecosystem of services
a period (Wang & Yang, 2021). The formula is as follows: related to water supply refers to the consumption of water
(by households, agriculture, and ecological environment).
Afinal Ainitial− 1 The water supply value was evaluated by the market price
K= × ×100% (I)
Ainitial T method (Ye et al., 2013; Deng et al., 2019; Zhang et al.,
2017). The formula is as follows:
Where K represents the land use dynamic index for a
∑
single land use type, A final and A initial are the area (hm ) of V ws= Q × P (III)
2
land use category at the final and initial year of the studied i i
period, respectively, and T is the period studied (year). If T
is one year, K refers to the annual change rate. Where V is the water supply value (yuan/a); Q is the
ws
i
water consumption for the i-th purpose (m /a); and P is
3
i
3
2.4. Analysis of ESV the market price of water for the i-th purpose (yuan/m ),
in which the price of water consumption was the price of
According to the relevant research of Costanza et al. water in Wuhan from 1996 to 2018.
(1997; 2014) and Xie et al. (2008; 2015), the evaluation
indexes selected in the study included production According to Wuhan Water Affairs Bureau and Wuhan
provision, water resource supply, gas regulation, climate Lake Bureau, the unit water consumption for agriculture,
Volume 5 Issue 2 (2023) 4 https://doi.org/10.36922/jcau.0427