SGD Investigation Along Huanghai and Bohai

Globally, the earliest SGD research on the Yellow Sea and Bohai Sea was carried out at the mouth of the Yellow River (Taniguchi et al. , 2008). They found that since 1990, a shortage of irrigation water had often cut off the lower reaches of the Yellow River, and conducted the study using direct observations to assess the impact on the Yellow River delta. They observed two different sections during 2004-2006 and calculated that SFGD per unit length coastline was 110m3/s in 2004 and 170 m3/s in 2006, which was equivalent to 4.5% to 7.0% of the Yellow River flow during the same period. During these three years, the largest SGD zone moved 2 km offshore from September 2004 to September 2006 due to coastal sediment deposition. In addition, they demonstrated a hydraulic link between surface and pore water under the seabed. However, this approach is limited by the amount of data.