城市地区单一草型土壤水分对降雨的响应特征

IF 2.7 4区 环境科学与生态学 Q2 Environmental Science
Jinbai Huang, Jiawei Wen, Diwen Luo, Chaofan Zhu
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引用次数: 0

摘要

城市化对城市地区的水文过程和水环境产生了重大影响。对土壤水分的研究是探索城市化背景下的水文特征所必需的。采用中国扬州市的一个区域性百慕大草地作为研究区域。分析了不同降雨事件下其对降雨入渗的响应特征。利用Penman–Monteith方程估算了0–30cm和0–10cm土层的每小时蒸散量。结果表明,根层(0–10cm)土壤水分的响应时间随着表层土壤水分的减少而减少。在不饱和状态下,土壤含水量的增加率随着降雨强度的增加而增加。根层土壤水分提供了总ET的70%以上。使用Hydrus-1D模型获得的不同深度土壤水分模拟结果的纳什效率系数大于0.75。通过使用Hydrus-1D模型的数值模拟,验证了不同降雨事件和渗透深度的结果的合理性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Response characteristics of soil moisture to rainfall for a single grass type in an urban area
Urbanization significantly impacts hydrological processes and the water environment in the urban area. Research works on soil moisture are necessary to explore the hydrological characteristics under the background of urbanization. A regional grassland with Bermudagrass in Yangzhou City, China, was adopted as the study area. An analysis of its response characteristics to rainfall infiltration was carried out for different rainfall events. The Penman–Monteith equation was used to estimate the hourly evapotranspiration (ET) of the soil layers at depths of 0–30 cm and 0–10 cm. The results indicate that the response time of the soil water content in the root layer (0–10 cm) decreases with the decrease of the soil water content in the topsoil. The rate of the increase of the soil water content increases as the rainfall intensity increases in the state of unsaturation. The soil water in the root layer provided more than 70% of the total ET. The Nash efficiency coefficient of the simulation results of the soil water content at different depths obtained using the Hydrus-1D model was more than 0.75. The rationality of the results for the different rainfall events and the infiltration depth were verified via numerical simulations using the Hydrus-1D model.
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来源期刊
Hydrology Research
Hydrology Research Environmental Science-Water Science and Technology
CiteScore
5.30
自引率
7.40%
发文量
70
审稿时长
17 weeks
期刊介绍: Hydrology Research provides international coverage on all aspects of hydrology in its widest sense, and welcomes the submission of papers from across the subject. While emphasis is placed on studies of the hydrological cycle, the Journal also covers the physics and chemistry of water. Hydrology Research is intended to be a link between basic hydrological research and the practical application of scientific results within the broad field of water management.
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