Optimization of the border size on the irrigation district scale – Example of the Hetao irrigation district

Wei-Bo Nie, Shu-Xin Dong, Yi-Bo Li and Xiao-Yi Ma

Agricultural Water Management, 2021, vol. 248, issue C

Abstract: To improve the performance of border irrigation, this study analyzed the spatial variability characteristics of the soil particle content and bulk density, based on soil physical parameters measured at 86 sampling points in the Hetao irrigation district (HID). The soil hydraulic parameters were determined using the RETC, and HYDRUS-1D was then adopted to estimate infiltration parameters of the Kostiakov equation at different locations. The optimal layout patterns of border size were proposed under the consideration of various combinations of different typical soil textures and field slopes by WinSRFR. The results indicated that the spatial distributions of clay and silt particle contents were generally high in the middle and low at both sides of the HID, while the sand was the opposite. The results proved that the soil physical parameters are only to be measured at depths of 0–20 and 20–40 cm to meet the needs of infiltration parameter estimation which can significantly reduce the workload of soil sample collection. Moreover, two types of optimal border layouts of different combinations of the soil textures (silt loam and silt clay loam) and field slopes (no more than 1‰, 1–3‰, and 3–5‰) were proposed, which can guarantee the application efficiency and distribution uniformity no less than 85%, and be the guidance for practical field irrigation in the HID.

Keywords: Border size; Infiltration parameters; Numerical simulation; Spatial distribution characteristics; Soil hydraulic parameters (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0378377421000330
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:agiwat:v:248:y:2021:i:c:s0378377421000330

DOI: 10.1016/j.agwat.2021.106768

Access Statistics for this article

Agricultural Water Management is currently edited by B.E. Clothier, W. Dierickx, J. Oster and D. Wichelns

More articles in Agricultural Water Management from Elsevier
Bibliographic data for series maintained by Catherine Liu ().