Dynamic monitoring of reclamation to analyze wetland changes using time-series remote sensing imagery

Xue Yang, Min Han

Tuesday 30 june 2015

12:36 - 12:39h at Asia (level 0)

Themes: (T) Managing deltas, (ST) Impacts of urbanization and land reclamation, Poster pitches

Parallel session: Poster pitches: 5C. Deltas - Impacts

With the development of social economy and marine resources exploitation, reclamation activities become an important way to ease the shortage of coastal land and promote the development of coastal cities. Reclamation activities bring economic benefits and at the same time also bring great threat for offshore resources and coastal wetland ecosystem. At the end of the river, estuarine delta is a dynamic balancing system formed by the interaction of the hydrological process of river, sea and land. Because of its geographical position superiority, estuarine deltas often become populated areas of reclamation activity. Time-series remote sensing data, such as LANDSAT data hold considerable promise for investigating long-term dynamics of land use/cover change (LUCC), given their significant advantages of frequent temporal coverage and free cost. In this paper, through the ARTMAP neural network automatic interpretation method, the LUCC information for Liaohe estuary wetland from 1989 to 2013 was obtained using the LANDSAT images as the data source. Results showed rapid growth for sea aquaculture in 1990-2000 and the process of sea aquaculture slowed down in 2000-2005. Later during the period, 2005-2013, the area of land reclamation project increased rapidly. Systems analysis of time and space dynamic evolution characteristics was implemented for reclamation and wetland surrounding Liaohe River. The reclamation estimation on the wetland ecosystem service function value loss was established, and the driving effect of reclamation on the evolution of wetland research was considered. So the LUCC information can provide a reference for both ecological restoration and compensation funds after the formation of reclamation.