基于RWEQ模型的疏勒河流域防风固沙功能价值评估

doi:10.12118/j.issn.1000－6060.2023.333

Abstract

Abstract:

The Shule River Basin is located in the northwest inland region of China and is a key node of the Belt and Road Initiative. In recent years, with the increasing intensity of global changes and economic and social activities, problems, such as the rapid expansion of construction land and desertification have affected the sustainable development of regional ecology and economic society. The Shule River Basin is located at the center of the northern sand prevention belt of China, and an evaluation of its wind prevention and sand fixation value is of great ecological significance for building a regional ecological security pattern and ensuring sustainable development of the basin. On the basis of the revised wind erosion equation model, the value of wind prevention and sand fixation in the Shule River Basin from 2008 to 2018 was evaluated. The results are as follows: (1) The total amount of wind prevention and sand fixation in the Shule River Basin from 2008 to 2018 was 43.927×10⁴ to 129.530×10⁴ t·km⁻², with an increasing trend in wind prevention and sand fixation capacity. (2) The value of wind prevention and sand fixation in the Shule River Basin rapidly increased from 2008 to 2018, with an annual average value ranging from high to low to reduce the value of land loss (99.46%), maintain the value of soil fertility (0.47%), maintain the value of soil organic matter (0.04%), and reduce the value of economic loss of transportation (0.03%). (3) The function of wind prevention and sand fixation in river basins is closely related to land use. Among them, the areas with stronger windproof and sand-fixing capability are primarily distributed in grassland, cropland, and other areas with higher vegetation cover; the low-value areas are primarily distributed in unused land of the land use type of the river basin. (4) Natural indicator factors have a greater impact on the value of wind and sand fixation functions in river basins than social factors. These findings can provide a basis for determining the subject and object of ecological compensation and compensation standards in the Shule River Basin.

Key words: wind prevention and sand fixation services, revised wind erosion equation (RWEQ), value evaluation, Shule River Basin

LIN Arong, ZHOU Dongmei, MA Jing, ZHU Xiaoyan, JIANG Jing, ZHANG Jun. Evaluation of wind prevention and sand fixation function in Shule River Basin based on RWEQ model[J].Arid Land Geography, 2024, 47(1): 58-67.

Figures/Tables 11

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分类	指标	编号
自然因素	植被指数/%	X1
	年降水/mm	X2
	年均温度/℃	X3
	土壤湿度/%	X4
社会经济因素	人均GDP/元	X5
社会经济因素	人口密度/人·km^-2	X6

土地利用类型	2008年		2013年		2018年		2008—2018年
土地利用类型	面积/km²	比例/%	面积/km²	比例/%	面积/km²	比例/%	增减量/km²
耕地	1405.94	1.21	1744.23	1.50	1788.95	1.54	383.01
林地	2.54	0.00	2.56	0.00	2.66	0.00	0.12
草地	13600.37	11.70	15125.72	13.01	15088.86	12.98	1488.49
水域	573.78	0.49	481.83	0.41	423.28	0.36	-150.50
建设用地	7.63	0.01	8.27	0.01	9.23	0.01	1.60
未利用地	100637.66	86.59	98865.29	85.06	98914.89	85.10	-1722.77
湿地	0.03	0.00	0.04	0.00	0.08	0.00	0.05

年份	土地利用类型	面积/km²	防风固沙量/10⁴ t·km^-2	单位面积潜在防风固沙量/10⁴ t·km^-2	单位面积实际防风固沙量/10⁴ t·km^-2	单位面积防风固沙量/t·km^-2
2008	耕地	1405.94	1.84	0.18	0.18	13.08
	林地	2.54	0.02	0.44	0.43	68.90
	草地	13600.37	41.39	0.16	0.16	30.43
	湿地	0.03	0.00	0.05	0.05	4.74
	水域	573.78	0.68	0.13	0.13	11.85
	总计	15582.66	43.93	0.96	0.95	129.00
2013	耕地	1744.23	34.13	0.56	0.54	195.70
	林地	2.56	0.02	0.41	0.41	69.21
	草地	15125.72	68.29	0.23	0.22	45.15
	湿地	0.04	0.00	0.07	0.06	15.07
	水域	481.83	1.32	0.31	0.31	27.36
	总计	17354.38	103.76	1.58	1.54	352.49
2018	耕地	1788.95	33.13	0.54	0.52	185.22
	林地	2.66	0.02	0.42	0.42	77.25
	草地	15088.86	94.97	0.27	0.27	62.94
	湿地	0.08	0.00	0.07	0.07	12.73
	水域	423.28	1.41	0.37	0.37	33.21
	总计	17303.83	129.53	1.67	1.65	371.35

年份	减少土地损失价值	保持土壤肥力价值	保持土壤有机质价值	减少交通运输经济损失的价值	总价值
2008	737.538	3.520	0.293	0.208	741.559
2013	1747.065	8.339	0.693	0.493	1756.590
2018	2185.012	10.429	0.867	0.617	2196.925

成分	初始特征值			提取载荷平方和
成分	总计	方差百分比/%	累计贡献率/%	总计	方差百分比/%	累计贡献率/%
1	4.559	75.977	75.977	4.559	75.977	75.977
2	1.038	12.471	88.448	1.038	12.471	88.448
3	0.325	6.616	95.064
4	0.115	3.109	98.172
5	0.009	1.356	99.529
6	-0.045	0.471	100.000

Evaluation of wind prevention and sand fixation function in Shule River Basin based on RWEQ model

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变量	主成分1	主成分2
X1	0.927	0.086
X2	0.855	-0.198
X3	0.766	0.582
X4	0.891	0.318
X5	0.849	-0.386
X6	0.931	-0.336

年份	F1	F2	F	排序
2008	-4.14	0.64	-3.07	11
2009	-3.01	0.89	-2.18	10
2010	-1.11	-0.63	-0.92	9
2011	-0.35	-0.75	-0.36	7
2012	-0.80	-1.29	-0.77	8
2013	0.62	-0.65	0.39	6
2014	0.78	-0.22	0.56	5
2015	1.57	0.73	1.29	4
2016	2.35	0.47	1.84	1
2017	1.99	0.47	1.57	3
2018	2.10	0.35	1.64	2

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