Study on the influence of high-level pond aquaculture effluent discharge on the particle shape distribution of beach sediments

doi:10.3969/j.issn.1000-5641.2025.02.010

Abstract

Abstract:

The direct discharge of high-level pond aquaculture effluent onto beaches is a common human activity along the South China coast. Investigating the mechanisms by which such activities affect the distribution patterns of beach sediment information is crucial for the sustainable utilization of coastal resources. This study explored the similarities and differences in the distribution of particle shape parameters between the beach influenced by high-level pond aquaculture and the unaffected beach, along with the reasons behind them, using characteristic values, spatial variation characteristics, and correlations among five particle shape parameters of surface sediments. The results show that: ① the characteristic values of the average particle shape parameters of the two types of beaches are relatively close; ② presence of certain differences in the spatial variation trends of aspect ratio, circularity, and convexity between the two types of beaches, amidst consistent spatial variation trends of symmetry and sphericity; and ③ the relationships between particle shape parameters and between particle shape parameters and grain size parameters in the two types of beaches were not significantly correlated. The discharge process of high-level pond aquaculture effluent and the resulting changes in gully topography alter the flow field and material distribution process of beach profiles, the primary reasons for the differences in particle shape parameters between the two types of beaches. This study provides a case study on how high-level pond aquaculture activities affect the distribution characteristics of beach sediment particle shape information. The findings contribute to a better understanding of the interaction mechanisms between marine aquaculture activities and sandy beach geomorphological processes.

Key words: beach surface sediments, particle shape parameters, high-level pond effluent discharge, Donghai Island, Zhanjiang

CLC Number:

P736.21+3

Gaocong LI, Mingming YUAN, Jian LIAO, Yali QI, Jieping TANG, Qiong XIA. Study on the influence of high-level pond aquaculture effluent discharge on the particle shape distribution of beach sediments[J]. J* E* C* N* U* N* S*, 2025, 2025(2): 97-105.

Figures/Tables 4

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Table 1

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剖面	粒形参数	$r_{\mathrm{A}} $		$d_{\mathrm{CI}} $		$d_{\mathrm{CO}} $		$d_{\mathrm{SY}} $
剖面	粒形参数	r	p	r	p	r	p	r	p
P1	$d_{\mathrm{CI}} $	0.759	0.004	1.000	0.000	0.895	0.000	–0.307	0.332
	$d_{\mathrm{CO}} $	0.872	0.000	0.895	0.000	1.000	0.000	0.050	0.876
	$d_{\mathrm{SY}} $	0.262	0.411	–0.307	0.332	0.050	0.876	1.000	0.000
	$d_{\mathrm{SP}} $	0.932	0.000	0.837	0.001	0.936	0.000	0.246	0.442
P2	$d_{\mathrm{CI}} $	–0.768	0.004	1.000	0.000	–0.687	0.014	–0.329	0.296
	$d_{\mathrm{CO}} $	0.904	0.000	–0.687	0.014	1.000	0.000	–0.790	0.002
	$d_{\mathrm{SY}} $	0.546	0.067	–0.329	0.296	–0.790	0.002	1.000	0.000
	$d_{\mathrm{SP}} $	0.368	0.239	0.000	1.000	0.616	0.033	0.921	0.000
P3	$d_{\mathrm{CI}} $	0.437	0.206	1.000	0.000	0.501	0.140	0.738	0.015
	$d_{\mathrm{CO}} $	0.938	0.000	0.501	0.140	1.000	0.000	0.904	0.000
	$d_{\mathrm{SY}} $	0.760	0.011	0.738	0.015	0.904	0.000	1.000	0.000
	$d_{\mathrm{SP}} $	0.792	0.006	0.781	0.008	0.903	0.000	0.992	0.000
P4	$d_{\mathrm{CI}} $	–0.323	0.306	1.000	0.000	–0.354	0.259	–0.148	0.646
	$d_{\mathrm{CO}} $	0.967	0.000	–0.354	0.259	1.000	0.000	0.802	0.002
	$d_{\mathrm{SY}} $	0.732	0.007	–0.148	0.646	0.802	0.002	1.000	0.000
	$d_{\mathrm{SP}} $	0.647	0.023	0.312	0.324	0.661	0.019	0.835	0.001
P5	$d_{\mathrm{CI}} $	0.263	0.434	1.000	0.000	0.044	0.898	0.001	0.998
	$d_{\mathrm{CO}} $	0.873	0.000	0.044	0.898	1.000	0.000	0.486	0.129
	$d_{\mathrm{SY}} $	0.521	0.100	0.001	0.998	0.486	0.129	1.000	0.000
	$d_{\mathrm{SP}} $	0.590	0.056	0.460	0.154	0.475	0.140	0.875	0.000
P6	$d_{\mathrm{CI}} $	0.442	0.150	1.000	0.000	0.530	0.076	0.427	0.166
	$d_{\mathrm{CO}} $	0.842	0.001	0.530	0.076	1.000	0.000	0.790	0.002
	$d_{\mathrm{SY}} $	0.505	0.094	0.427	0.166	0.790	0.002	1.000	0.000
	$d_{\mathrm{SP}} $	0.575	0.051	0.589	0.044	0.831	0.001	0.973	0.000

粒度参数	剖面	$r_{\mathrm{A}} $		$d_{\mathrm{CI}} $		$d_{\mathrm{CO}} $		$d_{\mathrm{SY}} $		$d_{\mathrm{SP}} $
粒度参数	剖面	r	p	r	p	r	p	r	p	r	p
平均粒径	P1	0.654	0.021	0.972	0.000	0.842	0.001	−0.408	0.188	0.750	0.005
	P2	0.973	0.000	−0.778	0.003	0.929	0.000	0.541	0.069	0.335	0.288
	P3	0.269	0.453	−0.554	0.097	0.031	0.931	−0.386	0.270	−0.359	0.308
	P4	0.934	0.000	−0.300	0.343	0.955	0.000	0.617	0.032	0.556	0.061
	P5	0.738	0.009	0.058	0.864	0.889	0.000	0.052	0.879	0.105	0.759
	P6	0.663	0.019	0.290	0.361	0.481	0.114	−0.129	0.690	−0.045	0.890
分选系数	P1	−0.743	0.006	−0.892	0.000	−0.728	0.007	0.204	0.525	−0.806	0.002
	P2	−0.709	0.010	0.215	0.501	−0.682	0.015	−0.501	0.097	−0.567	0.055
	P3	−0.756	0.011	−0.526	0.118	−0.552	0.098	−0.438	0.205	−0.522	0.122
	P4	−0.264	0.407	−0.543	0.068	−0.278	0.381	−0.130	0.686	−0.521	0.082
	P5	−0.120	0.726	−0.493	0.123	−0.138	0.686	−0.062	0.856	−0.332	0.318
	P6	−0.407	0.189	−0.790	0.002	−0.449	0.143	−0.333	0.290	−0.445	0.148
偏态	P1	−0.124	0.701	−0.597	0.040	−0.392	0.208	0.786	0.002	−0.159	0.622
	P2	−0.504	0.095	0.362	0.247	−0.317	0.315	0.047	0.884	0.172	0.594
	P3	−0.191	0.597	0.694	0.026	−0.186	0.606	0.155	0.669	0.211	0.559
	P4	−0.918	0.000	0.233	0.466	−0.894	0.000	−0.689	0.013	−0.666	0.018
	P5	−0.834	0.001	−0.167	0.623	−0.888	0.000	−0.343	0.302	−0.372	0.259
	P6	−0.407	0.189	−0.261	0.412	−0.295	0.351	0.138	0.669	0.003	0.992
峰态	P1	0.617	0.033	0.319	0.313	0.430	0.163	0.206	0.521	0.463	0.130
	P2	0.385	0.216	−0.054	0.867	0.161	0.617	−0.241	0.450	−0.173	0.591
	P3	0.815	0.004	0.533	0.113	0.858	0.002	0.777	0.008	0.772	0.009
	P4	0.431	0.161	0.617	0.033	0.403	0.194	0.226	0.479	0.610	0.035
	P5	0.020	0.953	0.182	0.591	0.094	0.784	−0.308	0.357	−0.152	0.655
	P6	0.548	0.065	0.066	0.839	0.462	0.131	0.302	0.340	0.335	0.287

海岸类型	自变量	因变量	回归方程相关程度的占比/%
			p < 0.01				0.01 ≤ p <0.05				p ≥ 0.05
			\|r\|<0.3	0.3≤\|r\|<0.5	0.5≤\|r\|<0.8	\|r\|≥0.8	\|r\|<0.3	0.3≤\|r\|<0.5	0.5≤\|r\|<0.8	\|r\|≥0.8	p ≥ 0.05
受影响岸滩	粒形参数	粒形参数	0	0	16.67	36.67	0	0	13.33	0	33.33
	平均粒径	粒形参数	0	0	13.33	26.67	0	0	6.67	0	53.33
	分选系数	粒形参数	0	0	13.33	13.33	0	0	20	0	53.33
	偏态	粒形参数	0	0	6.67	0	0	0	13.33	0	80
	峰态	粒形参数	0	0	13.33	13.33	0	0	6.67	0	66.66
未受影响岸滩	粒形参数	粒形参数	0	0	6.67	26.67	0	0	10	0	56.67
	平均粒径	粒形参数	0	0	6.67	20	0	0	13.33	0	60
	分选系数	粒形参数	0	0	6.67	0	0	0	0	0	93.33
	偏态	粒形参数	0	0	0	26.67	0	0	13.33	0	60
	峰态	粒形参数	0	0	0	0	0	0	13.33	0	86.67