中国西北干旱生态移民区跨流域调水生态效益研究——以黄花滩生态移民区为例

doi:10.12118/j.issn.1000-6060.2024.703

Abstract

Abstract:

Ecological migration and inter-basin water transfer are important measures for ecological restoration and environmental protection in the arid regions of northwest China, which are indispensable for rural revitalization and ecological civilization construction. This paper takes the ecological migrant area of Huanghuatan as research object, selecting 15 ecological indicators from four levels: natural meteorology, vegetation profiles, human activities and landscape patterns, constructs an ecological benefits evaluation system, and analyzes the impacts that nature and human activities have the ecological benefits of the study area from 2005 to 2020. The results indicated that: (1) Dry land, open land, and construction land increased, while other land use types fell in the Huanghuatan ecological migrant area from 2005 to 2020. The main transfer mode was conversion among dry land, grassland and bare land. (2) At the level of type, the fragmentation degree of grassland and bare land first decreased and then increased, the dry land first increased and then decreased, and other land use types went largely unchanged. At the level of landscape, with the exception of the degree of the aggregation index, indices showed a trend of increasing first and then decreasing. (3) The annual mean value of normalized difference vegetation index showed a continuous upward trend, increasing by 109.41% overall from 2005 to 2020, mainly showing a trend of continuous improvement from the high-value area to the surroundings. (4) The annual mean value of the net primary productivity (NPP) changed little, and the annual mean value of NPP in about 90% of the regions was 1-50 g C·m^-2. Exploratory research on the evaluation of ecological benefit in the arid region of northwest China can provide scientific and technological support for comprehensive evaluation of the ecological environmental benefits of ecological migration and inter-basin water transfer projects, as well as ecological protection management in the northwest arid region.

Key words: ecological benefits, ecological migration, inter-basin water transfer, landscape pattern, vegetation cover, arid region of northwest China

TIAN Jinhua, HUANG Xiao, GAO Yayu, HAO Jianbin, WU Guanheng, HE Wenbo. Ecological benefits of inter-basin water transfer in arid ecological migration regions of northwest China: A case of Huanghuatan ecological immigrant area[J].Arid Land Geography, 2025, 48(11): 1926-1938.

Figures/Tables 12

Fig. 1

Tab. 1

Data sources and ecological significance of ecological benefit evaluation indices"

要素层	指标层	生态学意义	数据来源
自然气象	年降水量	直接影响土地植被的生长、水资源的运动和分布、土壤侵蚀和养分流失等	中国科学院资源与环境科学数据中心（http://www.resdc.cn；2005—2023年；空间分辨率：中国地面国家级基准、古浪基本站）
	年蒸发量	反映土地利用和气候变化影响最有效的因素
	气温	气温变化直接影响生态系统的结构
	平均相对湿度	影响植被群落的结构和物种组成，进而影响生态系统的稳定性
植被概况	归一化植被指数	对植被变化状况监测、植被资源合理利用和其他生态环境相关领域的研究有十分重要的参考意义	国家地球系统科学数据中心（http://www.geodata.cn/；2005—2020年；空间分辨率：30 m×30 m）；Google Earth Engine平台（https://earthengine.google.com/；2005—2020年；空间分辨率：500 m×500 m）
植被概况	植被净初级生产力	评估生态系统的碳储存能力、生物量生产以及对气候变化的响应，可以更好地理解生态系统的生产力和健康状况
人类活动	土地利用	人类活动作用于自然环境的主要途径之一，是土地覆被变化的最直接和最主要的驱动因子	中国科学院资源与环境科学数据中心（http://www.resdc.cn；2005—2020年；空间分辨率：30 m×30 m）；景电工程管理局（2013—2022年）
	土地转移	人类活动作用于自然环境的主要途径之一，是土地覆被变化的最直接和最主要的驱动因子
	跨流域调水量	反映生态系统中人类活动的影响
景观格局	斑块数量	分析生态系统类型在区域内的分布规模和破碎程度，从而评估人类活动对景观格局的影响	基于土地利用数据利用FRAGSTATS 4.2软件计算所得
	斑块密度	分析生态系统类型在区域内的分布规模和破碎程度，从而评估人类活动对景观格局的影响
	分割度指数	评估景观破碎化对生态系统服务和生物多样性的影响，以及人类活动对生态系统的潜在影响
	辛普森多样性指数	有助于评估和理解生态系统的多样性和健康状态，从而为生态环境保护规划提供科学依据
	聚合度指数	考察每一种景观类型斑块间的连通性，有助于评估景观的连通性和生态过程的连续性
	分离度指数	衡量景观中斑块或区域的空间分散程度，其值越大，表示景观中的斑块被更多的线性特征（如道路、河流等）所分隔

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土地利用类型	2005年		2010年		2015年		2020年
土地利用类型	面积/km²	占比/%	面积/km²	占比/%	面积/km²	占比/%	面积/km²	占比/%
旱地	144.63	31.64	138.18	30.23	138.70	30.35	152.81	33.43
有林地	0.12	0.03	0.00	0.00	0.00	0.00	0.00	0.00
疏林地	3.58	0.78	3.58	0.78	3.58	0.78	3.60	0.79
中覆盖度草地	45.73	10.01	47.08	10.30	43.96	9.62	41.79	9.14
低覆盖度草地	155.66	34.06	154.45	33.79	151.89	33.23	153.15	33.50
农村居民点	1.95	0.43	2.05	0.45	4.12	0.90	1.84	0.40
建设用地	0.00	0.00	0.00	0.00	34.83	0.08	529.20	1.16
沙地	92.20	20.17	90.69	19.84	90.19	19.73	87.74	19.20
裸地	13.18	2.88	21.00	4.59	24.25	5.30	10.87	2.38

年份	斑块数量/个	斑块密度/个·km^-2	分割度指数	分离度指数	辛普森多样性指数	聚合度指数
2005	450	0.9846	0.9408	16.8841	0.7322	93.5590
2010	466	1.0196	0.9459	18.4766	0.7422	93.5449
2015	485	1.0612	0.9486	19.4632	0.7463	93.5702
2020	452	0.9888	0.9470	18.8768	0.7300	93.4910

年份	NDVI				NPP/g C·m^-2
年份	最小值	最大值	年均值	标准差	最小值	最大值	年均值	标准差
2013	0.02	0.63	0.17	0.07	3.00	253.00	41.20	71.60
2014	-0.07	0.57	0.18	0.07	12.00	253.00	45.75	69.84
2015	-0.18	0.63	0.16	0.06	4.00	253.00	42.81	70.88
2016	-0.13	0.66	0.18	0.08	4.00	253.00	42.81	70.88
2017	-0.35	0.64	0.17	0.06	4.00	253.00	42.81	70.88
2018	-0.26	0.65	0.21	0.08	4.00	253.00	42.81	70.88
2019	-0.24	0.61	0.22	0.07	2.00	253.00	41.04	71.59
2020	-0.25	0.64	0.18	0.07	4.00	253.00	42.81	70.88

Ecological benefits of inter-basin water transfer in arid ecological migration regions of northwest China: A case of Huanghuatan ecological immigrant area

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