Scholarlink

<p>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&#xa0;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.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

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

  • 期刊论文

  • 发表日期：

    2026年7月29日

查看全文
  • Jiteshwar Dadich,
  • Amit P. Kesarkar,
  • Jyoti Bhate,
  • Anantharaman Chandrasekar

摘要

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.