Accounting of ecosystem services value of broad beach river: taking the main stream of Liaohe River as an example

In order to solve the problem that the linear river ecosystem services value accounting should be based on the uniformity accounting for a long time, which is difficult to reflect the spatial differences, high-precision remote sensing data and conventional data were integrated to distinguish the ecosystem services types from three kinds of space, namely channel, floodplain and the river as a whole, the calculation methods and parameters of GIS platform were combed, a set of spatial accounting methods for broad beach river ecosystem services value was constructed, and it was applied in the case of the main stream of Liaohe River (MSLR). The results showed that in 2013, the total value of ecosystem services in the MSLR was 53.739 billion yuan, of which flood regulation and climate regulation accounted for 46.99% and 29.22%, respectively. The values of ecosystem services per unit area of different land use types were different, with higher values of river channel and pit and pond, and lower values of dry land, shrub, woodland, grassland, tidal flat and paddy field, being close to each other. The total value of ecosystem services in the MSLR in 2013 increased by 10.163 billion yuan compared with that in 2009; among the 4 cities (Tieling, Shenyang, Anshan and Panjin) that the MSLR flowed through, Panjin City in Liaohe River estuary had highest ecosystem services per unit area and the highest total value of ecosystem services.