Details
| Original language | English |
|---|---|
| Pages (from-to) | 3285-3298 |
| Number of pages | 14 |
| Journal | Water resources management |
| Volume | 30 |
| Issue number | 9 |
| Early online date | 13 May 2016 |
| Publication status | Published - Jul 2016 |
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.
Keywords
- Catchment simulation, Irrigation, SWAT, Water resources management
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
- Environmental Science(all)
- Water Science and Technology
Sustainable Development Goals
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In: Water resources management, Vol. 30, No. 9, 07.2016, p. 3285-3298.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Using SWAT for Strategic Planning of Basin Scale Irrigation Control Policies
T2 - a Case Study from a Humid Region in Northern Germany
AU - Maier, N.
AU - Dietrich, J.
PY - 2016/7
Y1 - 2016/7
N2 - 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.
AB - 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.
KW - Catchment simulation
KW - Irrigation
KW - SWAT
KW - Water resources management
UR - http://www.scopus.com/inward/record.url?scp=84966716403&partnerID=8YFLogxK
U2 - 10.1007/s11269-016-1348-0
DO - 10.1007/s11269-016-1348-0
M3 - Article
AN - SCOPUS:84966716403
VL - 30
SP - 3285
EP - 3298
JO - Water resources management
JF - Water resources management
SN - 0920-4741
IS - 9
ER -