Simple and Cost-Effective Method for Reliable Indirect Determination of Field Capacity

IF 3.1 Q2 WATER RESOURCES

Hydrology Pub Date : 2023-10-19 DOI:10.3390/hydrology10100202

Cansu Almaz, Markéta Miháliková, Kamila Báťková, Jan Vopravil, Svatopluk Matula, Tomáš Khel, Recep Serdar Kara

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引用次数: 0

Abstract

This study introduces a simple and cost-effective method for the indirect determination of field capacity (FC) in soil, a critical parameter for soil hydrology and environmental modeling. The relationships between FC and soil moisture constants, specifically maximum capillary water capacity (MCWC) and retention water capacity (RWC), were established using undisturbed soil core samples analyzed via the pressure plate method and the “filter paper draining method”. The aim was to reduce the time and costs associated with traditional FC measurement methods, as well as allowing for the use of legacy databases containing MCWC and RWC values. The results revealed the substantial potential of the “filter paper draining method” as a promising approach for indirect FC determination. FC determined as soil water content at −33 kPa can be effectively approximated by the equation FC33 = 1.0802 RWC − 0.0688 (with RMSE = 0.045 cm3/cm3 and R = 0.953). FC determined as soil water content at −5 or −10 kPa can be effectively approximated by both equations FC5 = 1.0146 MCWC − 0.0163 (with RMSE = 0.027 cm3/cm3 and R = 0.961) and FC10 = 1.0152 MCWC − 0.0275 (with RMSE = 0.033 cm3/cm3 and R = 0.958), respectively. Historical pedotransfer functions by Brežný and Váša relating FC to fine particle size fraction were also evaluated for practical application, and according to the results, they cannot be recommended for use.

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一种简单、经济、可靠的间接测定现场容量的方法

本文介绍了一种简单而经济的方法来间接测定土壤的田间容量(FC)，这是土壤水文和环境建模的一个关键参数。通过压力板法和“滤纸排水法”分析原状土芯样品，建立了FC与土壤水分常数，特别是最大毛管水容量(MCWC)和持水量(RWC)之间的关系。其目的是减少与传统FC测量方法相关的时间和成本，并允许使用包含MCWC和RWC值的遗留数据库。结果表明，“滤纸排水法”作为一种有前途的间接测定FC的方法具有很大的潜力。- 33 kPa时土壤含水量FC可有效地近似为:FC33 = 1.0802 RWC - 0.0688 (RMSE = 0.045 cm3/cm3, R = 0.953)。- 5或- 10 kPa土壤含水量测定的FC可以分别用方程FC5 = 1.0146 MCWC - 0.0163 (RMSE = 0.027 cm3/cm3, R = 0.961)和FC10 = 1.0152 MCWC - 0.0275 (RMSE = 0.033 cm3/cm3, R = 0.958)有效地近似。通过Brežný和Váša对FC与细粒度分数的历史土壤传递函数也进行了实际应用评估，根据结果，它们不能被推荐使用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Hydrology Earth and Planetary Sciences-Earth-Surface Processes

CiteScore

4.90

自引率

21.90%

发文量

192

审稿时长

6 weeks

期刊介绍： Journal of Hydrology publishes original research papers and comprehensive reviews in all the subfields of the hydrological sciences, including water based management and policy issues that impact on economics and society. These comprise, but are not limited to the physical, chemical, biogeochemical, stochastic and systems aspects of surface and groundwater hydrology, hydrometeorology, hydrogeology and hydrogeophysics. Relevant topics incorporating the insights and methodologies of disciplines such as climatology, water resource systems, ecohydrology, geomorphology, soil science, instrumentation and remote sensing, data and information sciences, civil and environmental engineering are within scope. Social science perspectives on hydrological problems such as resource and ecological economics, sociology, psychology and behavioural science, management and policy analysis are also invited. Multi-and interdisciplinary analyses of hydrological problems are within scope. The science published in the Journal of Hydrology is relevant to catchment scales rather than exclusively to a local scale or site. Studies focused on urban hydrological issues are included.