基于风暴水流能量分布对海南岛小东海珊瑚巨砾成因的分析*

doi:10.11978/2020093

Abstract

Abstract:

Storm and tsunamis boulders may be distinguished by analyzing wave energy dissipation patterns. Here, we use the principles of storm energy conservation and the transport by storm-induced flow, to establish a theoretical distribution pattern of storm boulders on a coral reef flat. The movements of coral boulders with different sizes during a storm event are quantified, to derive their transport distances. The method is applied to the Xiaodonghai coral reef flat of Hainan Island, in combination with the information on historical typhoon events. The result is generally in agreement with the in situ records of the boulders, indicating that the deposition of the boulders is controlled by the storm energy level and the physical properties of the boulders, i.e., the boulder deposits at Xiaodonghai are caused by storm events. In the future, a combined analytical procedure may be established if the storm- and tsunami-induced transport theories are further improved, with improved assumptions for modelling.

Key words: storm boulders, wave energy distribution, storm surge, material transport, criteria for boulder deposit, Hainan Island

CLC Number:

P736.213

WANG Yuanqi, YANG Yang, ZHOU Liang, WANG Yaping, GAO Shu. Interpreting the origin of coastal boulders on a coral reef flat at Xiaodonghai of Hainan Island based on storm wave energy analysis[J].Journal of Tropical Oceanography, 2021, 40(4): 110-121.

Figures/Tables 9

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References 54

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巨砾编号	长轴长度/m	中轴长度/m	短轴长度/m	Corey形状因子	质量/kg	巨砾位置与礁坪前缘的距离/m
XD01	2.94	2.58	2.11	0.8	19820	64.6
XD02	1.83	1.82	1.18	0.6	4914	53.8
XD03	2.15	1.72	1.19	0.6	6370	46.5
XD04	1.63	1.34	1.21	0.8	3986	47.6
XD05	1.88	1.67	1.22	0.7	5587	40.2
XD06	2.53	2.44	1.67	0.7	8627	31.8
XD07	2.29	1.85	1.19	0.6	6625	49.2
XD08	2.48	2.30	1.51	0.6	6334	43.1
XD09	3.47	1.93	1.39	0.5	6479	57.1
XD010	2.15	1.91	1.27	0.6	4350	70.6
XD011	2.83	2.46	1.64	0.6	9335	32.6
XD012	2.48	2.46	1.61	0.6	8427	37.1
XD013	3.12	2.47	1.17	0.4	9682	39.4
XD014	2.61	2.25	1.54	0.6	7225	57.1
XD015	3.34	2.23	1.48	0.5	9045	71.9
XD016	2.72	2.61	1.61	0.6	10683	116.0
XD017	3.10	2.22	1.31	0.5	7680	84.2
XD018	3.16	3.02	1.62	0.5	13777	72.0

Corey形状因子	巨砾质量/(×10³kg)	波高H=13m时的理论搬运距离/m	波高H=6m时的理论搬运距离/m
0.4	0.1	277.8	60.0
	1	127.6	28.1
	5	76.4	17.4
	10	61.7	14.3
	15	54.4	12.8
	20	49.9	12.0
0.6	0.1	285.6	61.7
	1	136.2	30.0
	5	81.1	18.3
	10	65.5	15.1
	15	57.6	13.5
	20	52.8	12.5
0.8	0.1	299.2	64.6
	1	139.4	30.6
	5	83.7	18.9
	10	67.2	15.5
	15	59.3	13.8
	20	54.3	12.8

巨砾编号	最小理论搬运距离/m	最大理论搬运距离/m	巨砾与礁坪前缘的实测距离/m
XD01	12.9	54.4	64.6
XD02	18.5	82.3	53.8
XD03	17.2	75.5	46.5
XD04	20.2	89.9	47.6
XD05	18.0	78.7	40.2
XD06	15.9	69.5	31.8
XD07	17.0	74.8	49.2
XD08	17.2	75.8	43.1
XD09	16.6	72.8	57.1
XD010	19.1	84.8	70.6
XD011	15.4	66.9	32.6
XD012	16.0	70.0	37.1
XD013	14.5	62.3	39.4
XD014	16.5	74.5	57.1
XD015	15.1	65.6	71.9
XD016	14.8	64.1	116.0
XD017	16.2	68.8	84.2
XD018	13.5	57.5	72.0

巨砾编号	巨砾与礁坪前缘的实测距离/m	风暴潮海浪波高/m
XD01	64.6	14.2
XD015	71.9	13.5
XD016	116.0	17.8
XD017	84.2	14.3
XD018	72.0	14.6

Interpreting the origin of coastal boulders on a coral reef flat at Xiaodonghai of Hainan Island based on storm wave energy analysis

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