近30年苏北滨海滩涂湿地演变特征与空间格局

doi:10.11820/dlkxjz.2014.09.008

Abstract

Abstract:

Coastal wetlands and tidal land in North Jiangsu Province are the most typical mudflat in China, which lies between the estuaries of the Yangtze River and the former Yellow River channel. This article examines the evolution and spatial distribution of wetlands and tidal land in North Jiangsu Province between 1980 and 2008 through image analysis of Landsat TM images from 1980 and 1992 and ALOS images from 2008. The results indicate that: (a) The study region had experienced enormous changes in this time period. The total area of coastal wetlands decreased by 1273.11 km², that is, at an annual rate of 45.47 km²; the erosion-sedimentation area was 965.14 km² and the erosion area was about 307.97 km². (b)This region can be divide into six geographic units from the north to the south, and three zones from the east to the west (overlay unit, changed unit, and mudflat unit); (c) In these natural units, the proportion of transformed wetlands was 38.39%, while the proportion of lost wetlands was 14.97%. Natural wetlands decreased by 354.1 km², constructed wetlands increased by 1061.45 km², and non-wetland area increased by 253.09 km². Changed units were about 20.51% of the total area, in which most wetlands are in natural successions. (d) The study area also had distinct regional succession characteristics and distribution patterns of vegetation communities. Natural wetlands succession occurred mainly in the changed units with a total area of 554.52 km², which is in agreement with the erosion/sedimentation situations of corresponding section.

Key words: tidal wetland, evolution feature, spatial distribution pattern, natural unit, changed unit, Jiangsu Province

CLC Number:

X142

Huajun LIAO, Guosheng LI, Shaohua WANG, Linlin CUI, Ninglei OUYANG. Evolution and spatial patterns of tidal wetland in North Jiangsu Province in the past 30 Years[J].PROGRESS IN GEOGRAPHY, 2014, 33(9): 1209-1217.

Figures/Tables 9

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References 27

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岸段	自然地理特征	生态保护区	入海河流流域分区	港口建设	海岸工程	海岸侵蚀/淤积状况
Ⅰ	废黄河三角洲冲积平原,粉砂-淤泥质海岸		三级：南四湖及运河区(灌河、中山河、废黄河、扁担河)	滨海港	废黄河三角洲海岸防护工程	严重侵蚀
Ⅱ	废黄河三角洲冲积平原,粉砂-淤泥质海岸		三级：里下河(运粮河、射阳河)	射阳港		侵蚀逐渐转向稳定略有淤涨
Ⅲ	海积平原,粉砂质潮滩,平均潮滩宽3~6 km	盐城珍禽国家级自然保护区	三级：里下河(黄沙港、新洋港、斗龙港)			淤涨
Ⅳ	海积平原,粉砂质潮滩,平均潮滩宽3~6 km,弶港附近可达14 km	大丰麋鹿国家级自然保护区	三级：里下河(王港河、疆界河、川东港、东台河、方塘河)	大丰港	大丰港引堤工程、东台近岸高涂匡围工程	淤涨明显
Ⅴ	长江三角洲冲积平原,粉砂、泥质粉砂为主,平均潮滩宽5~10 km		三级：里下河(长角河、梁垛河、北凌河)	洋口港、吕四港	如东西太阳沙人工岛工程	淤涨
Ⅵ	长江三角洲冲积平原,粉砂、泥质粉砂为主,平均潮滩宽0.6~3 km		三级：长江干流(团结河、通启运河)			岸段稳定

岸段	1980年	1992年	2008年	侵蚀/淤积面积/km²		速率/(m/a)
岸段	1980年	1992年	2008年	1980-1992		1992-2008	1980-2008	1980-1992	1992-2008	1980-2008
Ⅰ	448.59	445.72	435.25	-2.87	-10.47	-13.34		-3.39	-9.29	-6.77
Ⅱ	213.87	214.59	232.02	0.72	17.43	18.15		1.58	28.64	17.04
Ⅲ	443.30	493.73	645.65	50.43	151.92	202.35		75.99	171.69	130.68
Ⅳ	341.92	392.83	760.04	50.91	367.21	418.12		49.82	269.49	175.35
Ⅴ	208.06	219.44	480.36	11.38	260.92	272.30		9.89	170.13	101.46
Ⅵ	78.77	66.22	146.33	-12.55	80.11	67.56		-12.51	59.93	28.88

岸段	固有区								净变区
	天然湿地面积变化/km²					人工湿地面积变化/km²			天然湿地面积变化/km²				人工湿地面积变化/km²
	1980- 1992	1992- 2008		1980- 2008	1980- 1992		1992- 2008	1980- 2008		1980- 1992	1992- 2008	1980- 2008	1980- 1992	1992- 2008	1980- 2008
Ⅰ	-52.9	-1.18	-54.08		60.1	-14.35	45.75		-4	-1.34	-5.34		2.19	-3.85	-1.66
Ⅱ	-80.88	-83.81	-164.69		71.52	67.48	139		8.94	2.07	11.01		0	7.26	7.26
Ⅲ	52.65	-277.84	-225.19		68.11	148.02	216.13		43.94	34.75	78.69		0.84	120.8	121.64
Ⅳ	18.03	-282.69	-264.66		59.3	155.22	214.52		47.48	135.76	183.24		0.23	190.94	191.17
Ⅴ	2.07	-63.64	-61.57		45.27	-3.5	41.77		10.02	122.19	132.21		2.8	55.93	58.73
Ⅵ	-28.79	18.46	-10.33		0.04	-1.57	-1.53		-14.63	41.24	26.61		0.19	28.48	28.67
合计	-89.82	-690.7	-780.52		304.34	351.30	655.64		91.75	334.67	426.42		6.25	399.56	405.81

	湿地丧失							湿地转型						湿地演替
岸段	天然湿地/km²				人工湿地/km²				天然湿地/km²			人工湿地/km²		天然湿地/km²
岸段	1980- 1992	1992- 2008	1980- 2008	1980- 1992		1992- 2008	1980- 2008	1980- 1992	1992- 2008	1980- 2008	1980- 1992	1992- 2008	1980- 2008	1980- 1992	1992- 2008	1980- 2008
Ⅰ	8.73	13.20	21.93	6.22		5.94	12.16	46.39	0.64	47.03	2.73	2.21	4.94	6.45	1.45	7.90
Ⅱ	33.00	0.59	33.59	0.33		0.75	1.08	68.97	73.88	142.85	0.00	0.00	0.00	39.05	6.07	45.12
Ⅲ	18.08	39.57	57.65	3.01		0.02	3.03	42.19	255.36	297.55	0.00	0.00	0.00	97.73	27.71	125.44
Ⅳ	43.63	60.78	104.41	0.04		5.58	5.62	49.53	358.16	407.69	0.01	3.19	3.20	95.70	10.09	105.79
Ⅴ	12.29	103.8	116.09	4.96		9.36	14.32	23.02	71.01	94.03	1.46	0.00	1.46	14.48	3.79	18.27
Ⅵ	4.10	12.19	16.29	4.89		8.89	13.78	1.19	28.14	29.33	1.76	7.98	9.74	9.89	2.41	12.30
合计	119.83	230.13	349.96	19.45		30.54	49.99	231.29	787.19	1018.48	5.96	13.38	19.34	263.30	51.52	314.82

分段	芦苇/km²			大米草/km²				盐蒿/km²				茅草/km²
分段	1980-1992		1992-2008	1980-2008		1980-1992	1992-2008	1980-2008	1980-1992	1992-2008	1980-2008	1980-1992	1992-2008	1980-2008
Ⅰ	0.45	-22.38	-21.93	+1.38	2.54	+3.92		-3.57	-32.73	-36.3		0.45	-5.13	-4.68
Ⅱ	-17.47	-31.2	-48.67	+2.97	7.74	+10.71		31.24	-81.85	-50.61		-16.73	-45.49	-62.22
Ⅲ	42.66	-83.39	-40.73	+7.54	29.28	+36.82		21.85	-84.6	-62.75		-72.05	-16.6	-88.65
Ⅳ	-7.56	-13.91	-21.47	+6.15	133.53	+139.68		82.69	-187.76	-105.07		-81.28	-31.51	-112.79
Ⅴ	+1.68	10.35	+12.03	+11.60	56.97	+68.57		-13.16	-39.99	-53.15		-0.05	4.27	+4.22
Ⅵ	0	13.65	+13.65	-3.89	-7.44	-11.33		+3.89	-2.75	+1.14		0	9.54	+9.54
合计	19.76	-126.88	-107.12	25.75	222.62	248.37		122.94	-429.68	-306.74		-169.66	-84.92	-254.58

Evolution and spatial patterns of tidal wetland in North Jiangsu Province in the past 30 Years

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