• 公园绿地与城市功能空间耦合协调关系及影响因素分析——以乌鲁木齐市为例

    Subjects: Geosciences >> Geography submitted time 2024-05-31 Cooperative journals: 《干旱区地理》

    Abstract:公园绿地和城市功能空间是城市空间的组成部分,研究公园绿地与城市功能空间耦合协调关系及其影响因素,对优化公园绿地合理布局,促进城市功能空间协同发展具有重要意义。以乌鲁木齐市中心城区为研究对象,运用核密度分析、标准差椭圆、耦合协调度模型和地理探测器等方法,在分析公园绿地与城市功能空间分布格局的基础之上,进一步探析二者空间的耦合协调关系及其影响因素。结果表明:(1)公园绿地与城市各功能空间形成了内密外疏、圈层式递减、向西北方向扩展的空间聚集特征。(2)公园绿地与城市各功能空间的分布重心均与城市中心发生了一定程度的偏离。公园绿地、居住空间、交通运输空间、公共服务空间呈西北—东南方向分布。休闲娱乐空间、商业空间呈东北—西南方向分布。(3)公园绿地与城市各功能空间耦合协调的主导类型为中度失调型,耦合协调度呈现出“中部高、东西两侧和南北两翼低”的空间分异特征。其中,人口因素、交通条件是影响公园绿地与城市各功能空间耦合协调度的主要因素,社会经济则是次要因素。

  • 人类活动及气候变化影响下伊犁河谷生境质量预测研究

    Subjects: Geosciences >> Geography submitted time 2024-01-29 Cooperative journals: 《干旱区地理》

    Abstract:生境质量是衡量生态系统服务功能及其健康程度的重要指标,准确预测生境质量的演变对于推动区域生态环境的高质量发展至关重要。耦合系统动力学-斑块生成土地利用模拟(SD-PLUS)模型与生态系统服务和权衡的综合评估(InVEST)模型,预测了2035年不同气候情景下(SSP1-2.6、SSP2-4.5、SSP3-7.0、SSP5-8.5)伊犁河谷土地利用/覆被格局变化,并评估了其生境质量时空演变特征。结果表明:(1) 19802020年,伊犁河谷土地利用类型呈现4增2减的变化趋势。2035年4种气候情景下,伊犁河谷林草地面积降幅较大,建设用地扩张趋势较为明显,挤占了城郊优质耕地资源。(2) 伊犁河谷生境质量等级与土地利用/覆被类型密切相关。生境高值及较高值区主要分布在地形崎岖的林草地覆被区,低值及较低值区主要分布在人类活动集聚区及南北天山未利用地覆被区。(3) 19802020年,伊犁河谷生境质量呈现下降趋势。生境质量退化区主要分布在伊犁河-巩乃斯河流域以及特克斯河流域附近。(4) 2035年4种气候情景下,伊犁河谷生境指数持续走低。生境指数均值排序为:SSP1-2.6>SSP2-4.5>SSP3-7.0>SSP5-8.5。伊宁市、边境口岸、农牧业基地等区域生境质量存在退化风险。研究结果可为伊犁河谷地区生态修复政策的制定提供参考依据,为干旱区半干旱区生境质量预测提供新思路。

  • 基于PLUS 模型的乌鲁木齐市生态服务价值权衡协同探究

    Subjects: Geosciences >> Geography submitted time 2023-02-27 Cooperative journals: 《干旱区地理》

    Abstract: Land use/cover change will interfere with the stable supply capacity of ecosystems, which in turn poses a threat to ecosystem services and sustainable development. Taking Urumqi City of Xinjiang, China, as the study area, this study simulates land use changes in Urumqi City under multiple scenarios in 2030 based on the patch- generating land use simulation (PLUS) model and combines the equivalent factor method and spatial autocorrelation analysis to estimate and project the ecosystem service value (ESV) and its trade-off synergy for 1990—2030 in Urumqi City. The results are as follows: (1) Land use in Urumqi City shows a trend of“two increases and four decreases”from 1990 to 2020. In the integrated development scenario, the area of built- up land increases, while the area of ecological land is also on the rise; in the key development scenario, the expansion of urban built-up land is the most drastic, and the area of arable land is severely degraded. (2) From 1990 to 2020, the trend of ESV in Urumqi City has a“V”shape. In 2030, ESV increases under the ecological protection scenario and the comprehensive development scenario and decreases under the inertia development scenario and the key development scenario. (3) Under the four development scenarios in 2030, the synergistic relationships among various ecosystem services in Urumqi City are primarily synergistic, with“high-high”and “low-low”synergistic aggregation areas coinciding highly with the distribution of high and low ESV values, and trade-off relationships sporadically distributed in local areas. These findings may serve as a basis for distributing ESVs in Urumqi City and can also provide scientific reference for the spatial planning of Urumqi City and the construction of ecological security patterns.