JOURNAL OF YANGTZE RIVER SCIENTIFIC RESEARCH INSTI ›› 2010, Vol. 27 ›› Issue (10): 35-38.

• HEALTHY CHANGJIANG RIVER • Previous Articles     Next Articles

Environmental & Hydrogeological Factors of Tidal Marsh: A Case Study in Dongzhaigang Mangrove Reserve

XIA Yu-qiang, LI Hai-long   

  1. 1. School of Environmental Studies & (MOE) Biogeology and Environmental Geology Lab, China University of Geosciences, Wuhan 430074, China;2. Department of Civil and Environmental Engineering & Center for Natural Resources Development and Protection, Temple University, Philadelphia 19122, USA;3. School of Water Resources and Environmental Science, China University of Geosciences-Beijing, Beijing 100083, China
  • Online:2010-10-01 Published:2012-08-31

Abstract:

This paper briefly reviews the environmental and hydrogeological factors influencing the tidal mangrove marshes. The characteristics of sedimentation structure, hydrodynamics and groundwater hydrogeochemistry in Dongzhaigang Mangrove Marsh are presented for two transects: one is a mangrove marsh, the other is a bald beach. Field measurements show that pH and ORP in the mangrove transect are generally higher than those in the bald beach transect, while the former’s TDS is lower than the latter’s, and that the variation scope of shallow water quality is greater than that of deep water quality in the mangrove transect, while it is very little in the bald beach transect. Further analyses indicate that both transects are subject to the same tidal action and have the same tidal environment. The difference between the two transects is the inland freshwater recharge conditions. Along the mangrove transect, there is significant freshwater from inland. We conclude that the bald beach not to be covered by mangrove plants is due to the lack of freshwater and saltwater recharge envionrment to be suitable to mangrove growth.

Key words: intertidal zone  , mangrove marsh  , environmental and hydrogeological factors  , freshwater and saltwater interaction

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