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Estimation of Groundwater Usage for Water Curtain Cultivation using a Rating Curve
- Source :
- The Journal of Engineering Geology. 25:35-43
- Publication Year :
- 2015
- Publisher :
- The Korea Society of Engineering Geology, 2015.
-
Abstract
- A method is proposed to estimate groundwater usage for water curtain cultivation (WCC) using a rating curve, and it is applied to field measurements of groundwater discharge used for WCC in Wangjeon-ri, Nonsan. During the winter season, the hydraulic components of irrigation ditches in the study area consist mainly of direct run-off and groundwater discharged from nearby pumping wells. Changes in stage of the ditches were monitored, and a baseflow separation method was applied to remove increments in stage due to direct run-off. The resulting records of stage were translated to groundwater discharge by applying the-stage-discharge relation. The estimated average groundwater discharge for the WCC in Wangjeon-ri was 10,900 m3/d or 420 m3/d/ha when the estimation is normalized by the total area for WCC facilities of this region. Applying this estimation (420 m3/d/ha) to the entire area of the WCC in Korea (10,746 ha),and considering the number of pumping days for the WCC (120 days/year), the total ground water usage for the WCC nation-wide is estimated to be 0.54 billion m3. This is equivalent to 32% of the total groundwater discharge for agricultural use in Korea (1.7 billon m3).
- Subjects :
- Hydrology
Irrigation
Environmental Engineering
Baseflow
Water curtain
Environmental engineering
Rating curve
Geotechnical Engineering and Engineering Geology
Geography
Earth and Planetary Sciences (miscellaneous)
Separation method
Groundwater discharge
Stage (hydrology)
Engineering (miscellaneous)
Groundwater
Subjects
Details
- ISSN :
- 12265268
- Volume :
- 25
- Database :
- OpenAIRE
- Journal :
- The Journal of Engineering Geology
- Accession number :
- edsair.doi...........b51cf2dd6972e06b71d265847e9eca67