Appraisal of Soil Hydraulic Properties and Models Derived Using Pedotransfer Functions Over the Gadanki Region, India

IF 2.1 4区地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS

pure and applied geophysics Pub Date : 2026-07-29 DOI:10.1007/s00024-026-04067-z

Jiteshwar Dadich, Amit P. Kesarkar, Jyoti Bhate, Anantharaman Chandrasekar

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引用次数: 0

Abstract

Soil hydraulic conductivity and water retention model parameters are crucial in Land Surface Models (LSMs). This study evaluates soil hydraulic parameters derived from 23 widely used pedotransfer functions (PTFs) and their influence on simulated soil hydraulic behavior in soils of the Gadanki region (13.4593° N, 79.1684° E), Andhra Pradesh, India, using soil property inputs obtained from the global SoilGrids database. Volumetric water content was measured at different depths at this site during an isolated thunderstorm at 0500 h IST on October 18, 2018 (23:30 UTC October 17, 2018), followed by a two-week dry spell, to determine soil suction and unsaturated hydraulic conductivity. The results showed good agreement in this region. The Brooks-Corey model consistently predicts higher hydraulic conductivity and faster changes in soil suction than the Van Genuchten -Mualem model across multiple depths. These findings highlight that model choice substantially affects soil water flow simulations and should be carefully considered in light of soil characteristics and study objectives.

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印度Gadanki地区土壤水力特性评价及土壤传递函数模型

土壤导水率和保水性模型参数是陆面模型的关键参数。本研究利用全球SoilGrids数据库的土壤属性输入，评估了印度Andhra Pradesh Gadanki地区（13.4593°N, 79.1684°E） 23个广泛使用的土壤传递函数（ptf）的土壤水力参数及其对模拟土壤水力行为的影响。在2018年10月18日0500 h IST（2018年10月17日23:30 UTC）的孤立雷暴期间，在该站点不同深度测量了体积含水量，随后是为期两周的干旱期，以确定土壤吸力和非饱和水力导电性。结果表明，这一区域具有较好的一致性。与Van Genuchten -Mualem模型相比，Brooks-Corey模型在多个深度上一致地预测了更高的水力导电性和更快的土壤吸力变化。这些发现突出表明，模型选择对土壤水流模拟有很大影响，应根据土壤特性和研究目标仔细考虑。

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来源期刊

pure and applied geophysics 地学-地球化学与地球物理

CiteScore

4.20

自引率

5.00%

发文量

240

审稿时长

9.8 months

期刊介绍： pure and applied geophysics (pageoph), a continuation of the journal "Geofisica pura e applicata", publishes original scientific contributions in the fields of solid Earth, atmospheric and oceanic sciences. Regular and special issues feature thought-provoking reports on active areas of current research and state-of-the-art surveys. Long running journal, founded in 1939 as Geofisica pura e applicata Publishes peer-reviewed original scientific contributions and state-of-the-art surveys in solid earth and atmospheric sciences Features thought-provoking reports on active areas of current research and is a major source for publications on tsunami research Coverage extends to research topics in oceanic sciences See Instructions for Authors on the right hand side.