Long-term change in tidal dynamics and its cause in the Pearl River Delta, China

Hydrology, sediment circulation and long-term morphological changes in highly urbanized Shenzhen River estuary, China: A combined field experimental and modeling approach

“…For the tidal time series of CW, the MSL time series shows an upward trend by 1.96 mm per year, which agrees with the estimated value of 1.8-2.0 mm per year for the Pearl River estuary for the last 50 years (Zhang et al, 2010). Meanwhile, no significant trends are detected for both the MFTR and METR time series, which seems to contradict with the results of Zhang et al (2010). Zhang et al (2010) analyzed tidal series at 17 gauges in the Pearl River estuary, and found that the gauges near the estuary showed negative trends for tidal ranges during the study period.…”

“…Therefore, it should be concluded that the slightly decreasing MSSC is a combined effect of the increase of urban built-up area and the well-kept forest and orchard land. For the tidal time series of CW, the MSL time series shows an upward trend by 1.96 mm per year, which agrees with the estimated value of 1.8-2.0 mm per year for the Pearl River estuary for the last 50 years (Zhang et al, 2010). Meanwhile, no significant trends are detected for both the MFTR and METR time series, which seems to contradict with the results of Zhang et al (2010).…”

“…They also suggested that the change of flood range is possibly caused by human activities rather than natural impacts. If we divide the MFTR and METR time series of CW into two sub-series, one from 1964 to 1980 (representing the pre-urbanization period) and the other from 1981 to 2002 (representing the urbanization period), negative trends are detected for the tidal range during urbanization period by 2.3-2.4 mm per year, which matches the values at the river mouth stations (1.2-5 mm per year for Hengmen, Wanqingsha and Nansha) in the study of Zhang et al (2010). Therefore, the tidal force of the estuary is concluded to be decreasing during the urbanization of Shenzhen.…”

“…Meanwhile, no significant trends are detected for both the MFTR and METR time series, which seems to contradict with the results of Zhang et al (2010). Zhang et al (2010) analyzed tidal series at 17 gauges in the Pearl River estuary, and found that the gauges near the estuary showed negative trends for tidal ranges during the study period. They also suggested that the change of flood range is possibly caused by human activities rather than natural impacts.…”

Hydrochemistry, water quality and land use signatures in an ephemeral tidal river: implications in water management in the southwestern coastal region of Bangladesh

“…Tidal rivers in coastal deltas are dynamic in terms of variations in settings (e.g. Well 1995); changes of courses (e.g., Zhang et al 2010), rate of accretion and erosion (e.g., Rogers et al 2013) and the amount of water discharge/intake over short period. Such characteristics of tidal rivers lead to dynamic changes to coastal landscape.…”