Rapid response of tidal creek network patterns to the reclamation on the central Jiangsu coast

Shi Haidong; Shen Yongming; Kang Min

doi:10.3969/j.issn.0253-4193.2016.01.010

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Shi Haidong, Shen Yongming, Kang Min. Rapid response of tidal creek network patterns to the reclamation on the central Jiangsu coast[J]. Haiyang Xuebao, 2016, 38(1): 106-115. doi: 10.3969/j.issn.0253-4193.2016.01.010

Citation:

Shi Haidong, Shen Yongming, Kang Min. Rapid response of tidal creek network patterns to the reclamation on the central Jiangsu coast[J]. Haiyang Xuebao, 2016, 38(1): 106-115. doi: 10.3969/j.issn.0253-4193.2016.01.010

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Rapid response of tidal creek network patterns to the reclamation on the central Jiangsu coast

doi: 10.3969/j.issn.0253-4193.2016.01.010

Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, College of Geographic Science, Nanjing Normal University, Nanjing 210023, China

Received Date: 2015-03-23
Rev Recd Date: 2015-05-26

Abstract

Abstract

Tidal creek system,one of the most particular geomorphology units in muddy flat,is widely developed on central Jiangsu coast. This paper focuses on their evolutionary process in response to reclamation activities using TM/ETM+data of 2001-2013 and field investigation. The watershed area of tidal creeks decreased from 293.94 km² in 2001 to 103.40 km² in 2013 following sequential reclamation,which caused the decreasing of tidal creeks' length with power function and tidal creeks' width with exponential function. The average change rate of tidal creeks' length and width was 2.60 km and 0.67 m with 1 km² reclamation. The drainage pattern of tidal flat was changed from tidal creeks to beach,which implied that the tidal creeks systems in study area have a retrograde and demise tendency. The fractal dimension value D of each single tidal creeks and tidal creek systems were calculated from box-counting method. Results of calculation and analysis indicated that the fractal dimension value D in the region is greater than that of each tidal creek systems,followed by each single tidal creek. The fractal dimension value D in the region is positively correlated with the bifurcation ratio of tidal creek systems,and decreased from 1.26 in 2001 to 1.13 in 2013 with influences of reclamation. The fractal dimension value D of single tidal creek is positively correlated with the meandering of tidal creek. According to the retrograde and demise process of tidal creeks studied the results suggested that the tidal creek inheriting the runoff from land was the earliest tidal creeks,followed by the tidal creek scoured by the currents on tidal flat and tidal creek scoured by the converged tidal currents,whose primary form could be eroded indentation.
- tidal creeks,
- reclamation,
- morphologic evolution,
- Jiangsu coast

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