Page 100 - JCAU-5-2

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

Table 1. Methods to calculate ecosystem service values in Wuhan
Ecosystem service functions Valuation index Valuation method Calculation formula Indices
Type Sub‑type Indicator
Provisioning Agricultural Fruits, rice, fish, Market price method V =eM×P i V is the total value of agricultural products;
p
p
i
service products and so on M is the annual output of the i-th agricultural
i
products (kg); and P is the price of this
i
agricultural product in that year (yuan/kg)
Water supply Freshwater supply Market price method V =sQ ×P i V is the water supply value (yuan/a); Q is
ws
i
i
ws
the water consumption for the i-th purpose
(m /a); and P is the market price of water
3
i
3
for the i-th purpose (yuan/m )
Regulating Gas regulation CO fixation Replacement cost V =P ×A×(1.63×NPP+D ) V is the total value of gas regulation; NPP is
q
c
q
2
c
service method-afforestation +1.19×P ×A×NPP the net primary productivity of ecosystem (t/
o
2
cost method hm ·a); D is carbon density of soil (t/hm );
2
c
O emission Replacement cost P is the price of carbon sequestration
c
2 (yuan/t); P is the price of O production; and
method-oxygen o 2 2
production method A is the area of ecosystem (hm )
Climate Plant transpiration Replacement cost V =E×L×P /α V is the climate regulation value; E is the
cr
e
cr
regulation and water surface method transpiration (J/hm ·d); L is the evaporation
2
evaporation heat consumption coefficient (J/g); P is the
e
current electricity price (yuan/kWh); and α
is the air-conditioning efficiency ratio
Environmental SO treatment and Replacement cost V =Q ×P +Q ×P d V is the value of environmental
2
S
pe
S
d
pe
purification dust retention method of air purification; QS is the annual SO 2
pollutant reduction absorption (kg); Qd is the annual dust
reduction (t); P is the investment cost per
S
unit SO2 reduction (yuan/kg); and P is
d
the investment cost per unit dust reduction
(yuan/t)
Hydrological Water conservation Replacement V =A×(P-E)×P r V is the value of water conservation;
wc
wc
regulation engineering method A is the ecosystem area (hm ); P is the
2
annual precipitation (mm); E is the average
evapotranspiration (mm/a); and P is the
r
cost of reservoir per unit storage capacity
(yuan/t)
Flood regulation Replacement V =Q×P r V is the flood regulation value; Q is the
fr
fr
engineering method flood regulation volume (m /a); and P is
3
r
the reservoir cost per unit storage capacity
(yuan/t)
Supporting Soil conservation Prevention of soil Replacement cost V =A×P × (X -X )/ρ V is the annual reduced soil erosion value;
et
se
se
2
1
2
service erosion method A is the ecosystem area (hm ); Pet is the cost
of earthwork excavation and transportation
3
per unit volume (yuan/m ); X is the
2
potential erosion modulus (t/hm ·a); X1 is
2
the actual erosion modulus (t/hm ·a); and
2
ρ is the soil bulk density (g/cm )
3
Maintenance of Replacement price V =A×(X -X )×(NC / V is the annual fertilizer conservation
2
sf
sf
1
1
soil fertility method of fertilizer R +PC /R +KC /R +MC ) value; N, P, and K are the average content of
1 1 2 2 3 3
nitrogen, phosphorus, and potassium in soil
(%); R and R are the content of nitrogen
2
1
and phosphorus in standard fertilizer,
respectively (%); R is the potassium content
3
in standard fertilizer (%); C , C , and C are
2
1
3
the prices of (NH ) HPO , KCl, and organic
4
4 2
matter, respectively (yuan/t); and M is the
content of soil organic matter (%)
(Cont’d...)
Volume 5 Issue 2 (2023) 5 https://doi.org/10.36922/jcau.0427