Author(s)

S. N. Sin, H. Chua & W. Lo

Abstract

Sediment oxygen demand and nutrient balance in Tolo Harbour - a land-locked embayment in Hong Kong S. N. sin', H. ~ h u a ' & W. LO^ 1 Department of Civil and Structural Engineering, 2 Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic University, Hung Hom, Hong Kong PRC Abstract As a land-locked embayment in Hong Kong, Tolo Harbour has been receiving massive discharges of untreated municipal sewage, agricultural waste and cottage industrial effluent via river and watercourses over the last three decades. After implementation of the pollution control action plan in the early 1980s, the exogenous organic materials have been substantially reduced. However, the bottom sediments in the harbour have become a source of nutrients and exert a measurable oxygen demand upon overlying waters. In this paper, in vitro measurements of the sediment oxygen demand (SOD) were carried out. SOD values were found between 0.42-1.30 g~2/m2d. Nutrient data for the period 1982 to 1996 wer

Keywords