Next Article in Journal
A Hybrid Method of Analyzing Patents for Sustainable Technology Management in Humanoid Robot Industry
Previous Article in Journal
Potential for Eco-Industrial Park Development in Moncton, New Brunswick (Canada): A Comparative Analysis
Article Menu

Export Article

Open AccessArticle
Sustainability 2016, 8(5), 471; doi:10.3390/su8050471

Wetland Transitions and Protection under Rapid Urban Expansion: A Case Study of Pearl River Estuary, China

Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, Sichuan, China
*
Author to whom correspondence should be addressed.
Academic Editor: Vincenzo Torretta
Received: 26 February 2016 / Revised: 5 May 2016 / Accepted: 5 May 2016 / Published: 12 May 2016
View Full-Text   |   Download PDF [3602 KB, uploaded 12 May 2016]   |  

Abstract

Understanding wetland changes under urbanization is important for wetland management. In this study, net transition intensity (NTI) and total transition intensity (TTI) are presented to characterize wetland transitions based on spatial data obtained from Landsat satellite images of Pearl River estuary in South China. NTI is commonly used to represent changes in absolute amounts for each class of wetland, while TTI reflects the internal transition activities and amounts. The third index, the urbanization intensity index (UII), is used to investigate the intensity and velocity of urban land expansion at the same time periods. The results show that one-third of the total wetland area was lost from 1979 to 2009 in the study area and seven types of estuarine wetlands were degraded. The basic pattern of wetland transition is from natural wetlands to constructed wetlands and then to urban lands. Intertidal mud and sand and paddy fields were the major natural and constructed wetlands, respectively, transferred to urban lands. The TTI value was generally greater than the NTI value for these wetlands. TTI >> NTI is an important indicator for wetland transitions under rapid urban expansion in the Pearl River estuary. Based on the integration of the two indices (NTI and TTI), a protection and management plan framework for the Pearl River estuary wetlands is proposed. This plan emphasizes the key and important zones and their different features, and includes actions that can be implemented in and around natural and constructed wetlands. View Full-Text
Keywords: wetland transition; Landsat satellite images; urbanization expansion; protection plan; Pearl River estuary wetland transition; Landsat satellite images; urbanization expansion; protection plan; Pearl River estuary
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Zhao, H.; Wang, X.; Cai, Y.; Liu, W. Wetland Transitions and Protection under Rapid Urban Expansion: A Case Study of Pearl River Estuary, China. Sustainability 2016, 8, 471.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sustainability EISSN 2071-1050 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top