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.com
Volume 8, Issue 10 (Suppl)
J Earth Sci Clim Change, an open access
ISSN: 2157-7617
Climate Change 2017
October 19-21, 2017
CLIMATE CHANGE
October 19-21, 2017 | Rome, Italy
4
th
World Conference on
Adaptation to sea level rise from Shanghai city, China
Cheng Heqin
1,2,3
and
Chen Jiyu
3,4
1
East China Normal University, China
2
CGS, China
3
STCSM, China
4
ACEA, China
S
ea level rise (SLR) is a major of climate change. Changing coastal cities are situated in the delta regions expected to be
threatened by SLR to various degrees. Shanghai is one of those cities. In recent years, intensifying waterlogging, salt
intrusion, wetland loss, and ecosystem degradation in the city have generated the pressing need to create an urban form that is
suited to both current and future climates incorporating SLR. However, adaptation planning uptake is slow. This is particularly
unfortunate because patterns of urban form interact with mean sea level rise (MSLR) in ways that reduce or intensify its
impact. There are currently two main barriers that are significant in arresting the implementation of adaptation planning with
reference to the MSLR projections composed of geomorphologic MSLR projections and eustatic MSLR projections from global
climate warming, and making a comprehensive risk assessment of MSLR projections. The purpose of this study is to map
MSLR projections and their risk assessment approaches, and then the adaptation actions in the city. Grey model approaches
with linear fitting and the least squares measured tidal levels during1921-2000 in Wusong Vertical Elevation Datum at 5 tidal
gauge stations were utilized to estimate the eustatic MSLR (ESLR) projection from climate warming in the area. Hierarchical
partitioning analysis of variability in 2000-2009 is used to analyze urban land subsidence (ULS) projection. Digitized historical
nautical charts during 1997-2013 were utilized to map the magnitude of bed erosion, e.g. regional sea level fall (RSLF)
projection by anthropogenic geomorphologic changes. MIKE 21 was used to simulate the regional SLR (RSLR) caused by the
land reclamation. The total decadal SLR (DSLR) is supposed to consist of ESLR, ULS, RSLF, RSLR and tectonic subsidence.
Vladimir algorithm was used to calculate the variation in the tidal datum. ATP was used to make the risk assessment involved
in the timing and magnitude of MSLR projections on a shortage of fresh water supply in Shanghai city. Four design frequencies
of highest tidal level were assessed. The DSLR is 10-16 cm during 2011-2030. The standard of existing seawall needs to be
raised. New fresh water resource needs to be sought. Four adaptation strategies for responding to the total DSLR are proposed.
They are control of land subsidence, raising most of the seawall standard from one-in-100-year flood height to one-in-200-year
flood height, construction of a Huangpu River tidal barrier, and an integrated ecological engineering projection to cover the
salt marsh with artificial oyster reefs from the intertidal flats to the sub-tidal zone.
Biography
Cheng Heqin has her expertise in estuarine and coastal sediment dynamics and morphodynamics, integrated coastal zone management. Her long time measurement
data sets of the estuarine tidal level, current velocity, bathymetry, bedforms, channel morphology and transition regime of ripple-dune, response of sediment
dynamics to the human interventions in the watershed, fishery model in the East China Sea, semi-analytical model of sediment entrapment in estuaries, impact
of sea level rise in the Changjiang (Yangtze) river estuary create new pathways for improving sustainable management strategy of coastal system and adaptation
estuarine and coastal cities to sea level rise. She has built this challenging strategy after years of experience in research, evaluation, teaching and administration
in institutions. The foundation is based on most of historical data sets and methodology of field measurements, numerical simulation, huge experiences and data
analysis results from her colleagues in her institute, Shanghai Water Authority and many other institutes, which referred to be stakeholders of sea level rise.
hqch@sklec.ecnu.edu.cnCheng Heqin et al., J Earth Sci Clim Change 2017, 8:10(Suppl)
DOI: 10.4172/2157-7617-C1-036