量化橄榄树的灌溉吸收:一种结合同位素示踪和Hydrus-1D的概念验证方法

IF 2.8 3区环境科学与生态学 Q2 WATER RESOURCES

Hydrological Sciences Journal-Journal Des Sciences Hydrologiques Pub Date : 2023-06-20 DOI:10.1080/02626667.2023.2218552

P. Nasta, D. Todini-Zicavo, G. Zuecco, C. Marchina, D. Penna, J. McDonnell, Anam Amin, C. Allocca, F. Marzaioli, L. Stellato, M. Borga, N. Romano

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引用次数: 1

摘要

在温室试验中，将Hydrus-1D的同位素激活模块应用于盆栽橄榄树，追踪26个灌溉事件产生的水包。通过反演模型优化土壤水力参数，最小化3个土壤深度土壤含水量和土壤水同位素(18O)值与观测值之间的差异。用观察到的液流z分数和木质部水分18O值验证了模型的性能。通过分析虚拟示踪剂注入实验的质量突破曲线，定量确定了灌溉水的来源和通过时间。平均26%的灌溉水被植物蒸腾去除，平均转运时间为94小时。我们的概念验证工作表明，运输时间可能代表农业生态系统对灌溉水吸收的功能指标。

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Quantifying irrigation uptake in olive trees: a proof-of-concept approach combining isotope tracing and Hydrus-1D

ABSTRACT An isotope-enabled module of Hydrus-1D was applied to a potted olive tree to trace water parcels originating from 26 irrigation events in a glasshouse experiment. The soil hydraulic parameters were optimized via inverse modelling by minimizing the discrepancies between observed and simulated soil water content and soil water isotope (18O) values at three soil depths. The model’s performance was validated with observed sap flow z-scores and xylem water 18O. We quantified the source and transit time of irrigation water by analysing the mass breakthrough curves derived from a virtual tracer injection experiment. On average, 26% of irrigation water was removed by plant transpiration with a mean transit time of 94 hours. Our proof of concept work suggests that transit time may represent a functional indicator for the uptake of irrigation water in agricultural ecosystems.

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来源期刊

Hydrological Sciences Journal-Journal Des Sciences Hydrologiques 环境科学-水资源

CiteScore

6.60

自引率

11.40%

发文量

144

审稿时长

9.8 months

期刊介绍： Hydrological Sciences Journal is an international journal focused on hydrology and the relationship of water to atmospheric processes and climate. Hydrological Sciences Journal is the official journal of the International Association of Hydrological Sciences (IAHS). Hydrological Sciences Journal aims to provide a forum for original papers and for the exchange of information and views on significant developments in hydrology worldwide on subjects including: Hydrological cycle and processes Surface water Groundwater Water resource systems and management Geographical factors Earth and atmospheric processes Hydrological extremes and their impact Hydrological Sciences Journal offers a variety of formats for paper submission, including original articles, scientific notes, discussions, and rapid communications.