Using SWAT for Strategic Planning of Basin Scale Irrigation Control Policies

a Case Study from a Humid Region in Northern Germany

verfasst von

N. Maier, J. Dietrich

Abstract

The eco-hydrological model SWAT is used worldwide for simulating hydrology and water quality of agricultural catchments. One of the main water uses is irrigation, predominantly in arid and semi-arid regions. Climate impact simulations show that a future increase of irrigation demand can be expected for humid regions. Options for adaptation include the improvement of irrigation techniques and the modification of crop patterns. In our study we investigate the application of SWAT for the development of water saving irrigation control strategies in a humid river catchment in Northern Germany. We developed different scenarios using both soil moisture deficit control and plant water demand control. The results show plausible changes of irrigation amounts when changing the trigger points of both control methods. By deficit control strategies, the water consumption could be reduced with only a moderate decrease of crop yield. Differences between soil characteristics were well shown in the SWAT simulations, but the model consistently overestimated irrigation values. Furthermore we found a high variability of the model errors between the different years, even if the long term average values are considered acceptable. Future research is needed to improve the model accuracy in automatic irrigation control.

Organisationseinheit(en)

Institut für Hydrologie und Wasserwirtschaft

Externe Organisation(en)

Justus-Liebig-Universität Gießen

Typ

Artikel

Journal

Water resources management

Band

30

Seiten

3285-3298

Anzahl der Seiten

14

ISSN

0920-4741

Publikationsdatum

07.2016

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Tief- und Ingenieurbau, Gewässerkunde und -technologie

Ziele für nachhaltige Entwicklung

SDG 13 – Klimaschutzmaßnahmen

Elektronische Version(en)

https://doi.org/10.1007/s11269-016-1348-0 (Zugang: Geschlossen)