Investigation of infiltration rate for soil-biochar composites of water hyacinth

Acta Geophysica

Peng Lin¹  Poly Buragohain²  Sanandam Bordoloi²  Phani Gopal³  Raval Ratnam³  S. Sreedeep³  Ankit Garg³  Weiling Cai³ 

[1] Indian Institute of Technology Guwahati;Mahindra École Centrale;Shantou University

关键词: Biochar;    Cracked soil;    Interactive effects;    Infiltration;    Natural field work;    ANN;   

DOI  :  10.1007/s11600-018-0237-8

学科分类：地球科学(综合)

来源: Polska Akademia Nauk * Instytut Geofizyki

【 摘 要 】

The objective of this short communication is to investigate the interactive effects of CIF, suction and volumetric water content (VWC) on infiltration rate for compacted soil–biochar (BC) composites (0%, 5% and 10%). The biochar was produced from an invasive weed Eichhornia crassipes. Soil parameters such as suction (ψ), VWC, CIF and infiltration rate were monitored simultaneously for 63 days (9 drying–wetting cycles) in those composites. This was followed by statistical modeling using artificial neural networks. Results showed that increase in WH BC content reduced the infiltration rates. The role of CIF in determining the infiltration rate reduced (50–38%) with the addition of BC to soil. Suction played an equal role (36–35%), both for bare soil and for WH BC composites, in determining the infiltration rate. Significance of VWC in determining rate of infiltration increases (14–27%) as the BC content increases. This is more likely, as the addition of BC enhanced the water retention capacity.

【 授权许可】

Unknown