Trends Analysis of Ecological Environment Security Based on DPSIR Model in the Coastal zone: A survey study in Tianjin, China

Document Type : Original Research Paper

Authors

1 College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China

2 Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin, 300071, China

Abstract

The “Driving force - Pressure - State - Impact – Response” modeling framework is
adopted to consider the formation mechanisms of environmental risks and the requirements of
ecological environment protection. Moreover, a systematical index system and evaluation model for
the measurement of the coastal ecological security level is put forward in this paper to assess the
state of coastal ecological environment security. The results show that the security level of the
Tianjin coastal ecological environment exhibits an overall downward trend, with the coastal ecological
environment security value (E) falling from 0.7491 in 2005 (in good condition) to 0.2773 in 2010 (in a
poor state) , and the value will continue to decline into a bad state in the next decade. The increasing
use of coastal areas, growing population and increasing emissions of pollutants into the sea are the
primary phenomena leading to environmental degradation of coastal ecosystems, which further
leads to the degeneration of the ecological and environmental conditions of the coastal zone in
Tianjin. The inshore marine ecosystem is always in the sub-healthy and unhealthy state, which has
affected the balance of the marine ecosystem and led to poor biomes structure. At present, the
marine ecosystem conservation actions, including pollution control, monitoring and surveillance
system and emergency management mechanism, are not enough to offset the impacts on the marine
ecosystem caused by driving force and pressure changes. It is necessary to establish a coordinated
integration management system for the land and sea and an ecological compensation mechanism.

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