The Spatio-temporal Dynamic Evolution of Tidal Channels in the Liaohe River Estuary Wetland from 2013 to 2022
As vital connections between terrestrial and marine ecosystems,tidal channels exhibit a high level of spatio-temporal dynamics.However,under the influence of human activities,the growth trends of tidal channels in the Liaohe River estuary wetland have not been properly recognized.In this study,spatial analysis and statistical methods were employed to quantitatively characterize the temporal and spatial dynamics of tidal channels in the Liaohe River estuary wetland from 2013 to 2022,and the development status and trends of tidal channels in the west bank,the east bank and the estuary alluvial island were compared.The results showed that the development of tidal channels in the Liaohe River estuary wetland has a significant spatial clustering characteristic from 2013 to 2022,and the coastal tidal flat area was the hotspot and the upstream estuary area was the coldspot.From 2013 to 2022,the length and number of tidal channels in the Liaohe River estuary wetland showed an increasing trend,with an average annual increase of 40.8 km in length and 239 channels.The development of tidal channels in the Liaohe River estuary wetland exhibited significant spatial heterogeneity.The development scale of tidal channels on the west bank was the largest,with a total increase of 238.71 km in length and a total increase of 1 216 channels.The tidal channels on the east bank showed the highest values of frequency,density,and bifurcation ratio,as well as the best fractal characteristics among the three districts.The tidal channels in the estuary alluvial island had the highest hydrological network connectivity and the strongest transmission capacity of the channel networks among the three districts.The length and number of tidal channels were significantly correlated.The fractal dimension of tidal channels was significantly related with frequency,density and separation rate.This study provides insights into the dynamic growth of tidal channels in the Liaohe River estuary wetland and aims to provide scientific support for wetland conservation and policy making.
the Liaohe River estuarycoastal wetlandtidal channelhotspot analysisfractal dimension
NETL
NSTL
万方数据
