Enhancing soil health in urban green spaces: The critical role of terrain and hydrological connectivity in nutrient redistribution

IF 5.4 1区 农林科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY
Pengcheng Lv , Yang Liu , Xiaoli Jia , Rui Li , Honglin Zhang , Yunlong Zhai , Tianyu Zhang
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Abstract

Urban green spaces are essential for maintaining ecological balance, although the distribution of soil nutrients in these areas can be considerably influenced by topographic features and hydrological connectivity. Understanding the interaction of these factors is crucial for developing sustainable land management practices that optimize soil health. We explore the role of terrain characteristics and hydrological connectivity in shaping soil nutrient distribution across urban parks. A total of 40 plots across two urban parks were surveyed to adequately capture variations in topography and hydrological connectivity within the study areas. The research focused on topographic attributes such as elevation, slope, and curvature, along with hydrological factors like flow paths and wetness indices. The results demonstrate that while individual topographic features show limited direct effects on nutrient levels, their combined influence through hydrological connectivity is substantial. Hydrological connectivity was a key driver of nutrient redistribution, highlighting the role of water-mediated transport. Additionally, we revealed that relationships between terrain and nutrient distribution vary with scale, emphasizing the need for high-resolution digital elevation models to capture fine-scale terrain variations critical for accurately modelling hydrological connectivity and nutrient dynamics. Our findings suggest that terrain modifications, such as slope adjustments, microtopographic reshaping, or the creation of artificial depressions, can improve nutrient retention and support sustainable management of urban green spaces. We provide valuable insights for urban land management, contributing to the optimization of nutrient distribution, and the enhancement of urban ecosystem functionality.

Abstract Image

增强城市绿地土壤健康:地形和水文连通性在养分再分配中的关键作用
城市绿地对于维持生态平衡至关重要,尽管这些地区的土壤养分分布可能受到地形特征和水文连通性的很大影响。了解这些因素之间的相互作用对于制定可持续的土地管理措施以优化土壤健康至关重要。我们探讨了地形特征和水文连通性在塑造城市公园土壤养分分布中的作用。研究人员对两个城市公园的40个地块进行了调查,以充分捕捉研究区域内地形和水文连通性的变化。研究重点是高程、坡度、曲率等地形属性,以及流道、湿度指数等水文因子。结果表明,虽然个别地形特征对营养水平的直接影响有限,但它们通过水文连通性的综合影响是巨大的。水文连通性是养分再分配的关键驱动因素,突出了水介导运输的作用。此外,我们揭示了地形和养分分布之间的关系随尺度而变化,强调需要高分辨率数字高程模型来捕捉精细尺度的地形变化,这对于准确模拟水文连通性和养分动态至关重要。我们的研究结果表明,地形改变,如坡度调整、微地形重塑或人工洼地的创造,可以改善营养物质的保留,并支持城市绿地的可持续管理。为城市土地管理提供有价值的见解,有助于优化养分分布,增强城市生态系统功能。
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来源期刊
Catena
Catena 环境科学-地球科学综合
CiteScore
10.50
自引率
9.70%
发文量
816
审稿时长
54 days
期刊介绍: Catena publishes papers describing original field and laboratory investigations and reviews on geoecology and landscape evolution with emphasis on interdisciplinary aspects of soil science, hydrology and geomorphology. It aims to disseminate new knowledge and foster better understanding of the physical environment, of evolutionary sequences that have resulted in past and current landscapes, and of the natural processes that are likely to determine the fate of our terrestrial environment. Papers within any one of the above topics are welcome provided they are of sufficiently wide interest and relevance.
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