Improving border irrigation performance with predesigned varied-discharge

Kaihua Liu; Xiyun Jiao; Weihua Guo; Yunhao An; Mohamed Khaled Salahou

doi:10.1371/journal.pone.0232751

Improving border irrigation performance with predesigned varied-discharge

PLoS One. 2020 May 6;15(5):e0232751. doi: 10.1371/journal.pone.0232751. eCollection 2020.

Authors

Kaihua Liu^{1

2}, Xiyun Jiao^{1

2

3}, Weihua Guo², Yunhao An^{1

2}, Mohamed Khaled Salahou¹

Affiliations

¹ State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, China.
² College of Agricultural Engineering, Hohai University, Nanjing, China.
³ Cooperative Innovation Center for Water Safety and Hydro Science, Hohai University, Nanjing, China.

Abstract

Insufficient water resources restrict wheat production in the North China Plain, so it is urgent and essential to improve the border irrigation performance and water use efficiency. This study developed a predesigned varied-discharge irrigation scheme in the closed-ended border. Field treatments, including continuous-discharge (CD), increased-discharge (ID) and decreased-discharge (DD) border irrigation tests, were conducted to evaluate the irrigation performance of the proposed varied-discharge scheme. The DD border irrigation treatment had great application efficiency (AE), distribution uniformity (DU) and requirement efficiency (RE), and its comprehensive evaluation indicator (Y) was also significantly higher than other treatments. DD treatment achieved the average AE, DU, RE and Y values of 91.4%, 95.5%, 99.5% and 95.4%, respectively. Furthermore, the hydraulic simulation model WinSRFR was used to optimize the scheme of predesigned varied-discharge border irrigation, and sensitivity analyses of infiltration parameters, roughness coefficient, slope and inflow rate were carried out. The results indicate that the predesigned varied-discharge border irrigation scheme can improve the irrigation performance, and the DD border irrigation scheme has more satisfactory robustness than that of the ID border irrigation scheme.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Agricultural Irrigation / methods*
China
Groundwater*
Humans
Models, Theoretical
Seasons
Soil
Triticum / growth & development*
Water
Water Resources / supply & distribution*
Water Supply / methods*

Substances

Soil
Water

Grants and funding

This research was funded by National Natural Science Foundation of China, grant number 51879073 and 51609064. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.