Open AccessPhysical Features of Water and Surface Sediments in the Ha Long Bay, Viet Nam
Author(s) -
Dang Hoai Nhon
Publication year - 2017
Publication title -
tạp chí khoa học đại học quốc gia hà nội: nghiên cứu giáo dục (vnu journal of science: education research)/tạp chí khoa học đại học quốc gia hà nội: các khoa học trái đất và môi trường (vnu journal of science: earth and environmental sciences)
Language(s) - English
Resource type - Journals
eISSN - 2615-9279
pISSN - 2588-1094
DOI - 10.25073/2588-1094/vnuees.4125
Subject(s) - bay , turbidity , sediment , silt , geology , surface water , salinity , water quality , environmental science , oceanography , hydrology (agriculture) , geomorphology , environmental engineering , ecology , geotechnical engineering , biology
Water and surface sediment features of the Ha Long Bay play important role in the aquatic life and sustainability of ecosystems. Water in the Ha Long Bay is measured in both dry and rainy seasons with temperature, salinity, turbidity, DO, TSS, pH. Surface sediment is measured pH, Eh, particles size, minerals. The quality water of the bay is generally within the Vietnamese Standard for aquaculture. The type surface sediments distribute from sand to silt, in which the silt occupies a large area in the Ha Long Bay. The values of pH and Eh in surface sediment show that sedimentary environments light alkaline – reduced. The high content of minerals in surface sediment is quartz, kaolinite, illite, calcite, and goethite. The water in the bay is impacted from mainland by showing the change of salinity, turbidity, TSS.