| Records |
| Author |
Demuth, S.; Külls, C. |
| Title |
Probability analysis and regional aspects of droughts in southern Germany |
Type |
Journal Article |
| Year |
1997 |
Publication |
Sustainability of Water Resources under Increasing Uncertainty |
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| Volume |
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Issue |
240 |
Pages |
97 |
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Iahs |
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| Call Number |
THL @ christoph.kuells @ Demuth1997probability |
Serial |
35 |
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| Author |
Benito, G.; Rohde, R.; Seely, M.; Külls, C.; Dahan, O.; Enzel, Y.; Todd, S.; Botero, B.; Morin, E.; Grodek, T. |
| Title |
Management of alluvial aquifers in two southern African ephemeral rivers: implications for IWRM |
Type |
Journal Article |
| Year |
2010 |
Publication |
Water Resources Management |
Abbreviated Journal |
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| Volume |
24 |
Issue |
4 |
Pages |
641-667 |
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Springer Netherlands |
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no |
| Call Number |
THL @ christoph.kuells @ Benito2010management |
Serial |
25 |
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| Author |
Dahan, O.; Tatarsky, B.; Enzel, Y.; Külls, C.; Seely, M.; Benito, G. |
| Title |
Dynamics of flood water infiltration and ground water recharge in hyperarid desert |
Type |
Journal Article |
| Year |
2008 |
Publication |
Groundwater |
Abbreviated Journal |
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| Volume |
46 |
Issue |
3 |
Pages |
450-461 |
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| Publisher |
Blackwell Publishing Inc Malden, USA |
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no |
| Call Number |
THL @ christoph.kuells @ Dahan2008dynamics |
Serial |
27 |
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| Author |
Androvitsanea, A.; Fawzy, M.; Fuchs, J.; Külls, C.; Fahlbusch, H.; Heiden, J. |
| Title |
Hydrologische Bedingungen im Heraion von Samos vom 12. bis 8. Jh. v. Chr. und ihre Bedeutung für die wasserbauliche Infrastruktur |
Type |
Journal Article |
| Year |
2018 |
Publication |
Environmental Water Engineering |
Abbreviated Journal |
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| Volume |
1 |
Issue |
1 |
Pages |
1-21 |
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no |
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THL @ christoph.kuells @ Androvitsanea2018hydrologische |
Serial |
17 |
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| Author |
Klock, H.; Külls, C.; Udluft, P. |
| Title |
Estimating recharge values using hydrochemical and geological data: a case study from the |
Type |
Conference Article |
| Year |
2001 |
Publication |
Impact of Human Activity on Groundwater Dynamics: Proceedings of an International Symposium (Symposium S3) Held During the Sixth Scientific Assembly of the International Association of Hydrological Sciences (IAHS) at Maastricht, The Netherlands, from 18 t |
Abbreviated Journal |
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| Volume |
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Issue |
269 |
Pages |
25 |
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Conference |
International Assn of Hydrological Sciences |
| Notes |
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Approved |
no |
| Call Number |
THL @ christoph.kuells @ Klock2001estimating |
Serial |
60 |
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| Author |
Eliades, M.; Bruggeman, A.; Djuma, H.; Christofi, C.; Kuells, C. |
| Title |
Quantifying Evapotranspiration and Drainage Losses in a Semi-Arid Nectarine (Prunus persica var. nucipersica) Field with a Dynamic Crop Coefficient (Kc) Derived from Leaf Area Index Measurements |
Type |
Journal Article |
| Year |
2022 |
Publication |
Water |
Abbreviated Journal |
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| Volume |
14 |
Issue |
5 |
Pages |
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| Abstract |
Quantifying evapotranspiration and drainage losses is essential for improving irrigation efficiency. The FAO-56 is the most popular method for computing crop evapotranspiration. There is, however, a need for locally derived crop coefficients (Kc) with a high temporal resolution to reduce errors in the water balance. The aim of this paper is to introduce a dynamic Kc approach, based on Leaf Area Index (LAI) observations, for improving water balance computations. Soil moisture and meteorological data were collected in a terraced nectarine (Prunus persica var. nucipersica) orchard in Cyprus, from 22 March 2019 to 18 November 2021. The Kc was derived as a function of the canopy cover fraction (c), from biweekly in situ LAI measurements. The use of a dynamic Kc resulted in Kc estimates with a bias of 17 mm and a mean absolute error of 0.8 mm. Evapotranspiration (ET) ranged from 41% of the rainfall (P) and irrigation (I) in the wet year (2019) to 57% of P + I in the dry year (2021). Drainage losses from irrigation (DR_I) were 44% of the total irrigation. The irrigation efficiency in the nectarine field could be improved by reducing irrigation amounts and increasing the irrigation frequency. Future studies should focus on improving the dynamic Kc approach by linking LAI field observations with remote sensing observations and by adding ground cover observations. |
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Edition |
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| ISSN |
2073-4441 |
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| Notes |
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Approved |
no |
| Call Number |
THL @ christoph.kuells @ Marinos2022 |
Serial |
82 |
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| Author |
Eliades, M.; Bruggeman, A.; Djuma, H.; Christofi, C.; Kuells, C. |
| Title |
Quantifying Evapotranspiration and Drainage Losses in a Semi-Arid Nectarine (Prunus persica var. nucipersica) Field with a Dynamic Crop Coefficient (Kc) Derived from Leaf Area Index Measurements |
Type |
Journal Article |
| Year |
2022 |
Publication |
Water |
Abbreviated Journal |
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| Volume |
14 |
Issue |
5 |
Pages |
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| Keywords |
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| Abstract |
Quantifying evapotranspiration and drainage losses is essential for improving irrigation efficiency. The FAO-56 is the most popular method for computing crop evapotranspiration. There is, however, a need for locally derived crop coefficients (Kc) with a high temporal resolution to reduce errors in the water balance. The aim of this paper is to introduce a dynamic Kc approach, based on Leaf Area Index (LAI) observations, for improving water balance computations. Soil moisture and meteorological data were collected in a terraced nectarine (Prunus persica var. nucipersica) orchard in Cyprus, from 22 March 2019 to 18 November 2021. The Kc was derived as a function of the canopy cover fraction (c), from biweekly in situ LAI measurements. The use of a dynamic Kc resulted in Kc estimates with a bias of 17 mm and a mean absolute error of 0.8 mm. Evapotranspiration (ET) ranged from 41% of the rainfall (P) and irrigation (I) in the wet year (2019) to 57% of P + I in the dry year (2021). Drainage losses from irrigation (DR_I) were 44% of the total irrigation. The irrigation efficiency in the nectarine field could be improved by reducing irrigation amounts and increasing the irrigation frequency. Future studies should focus on improving the dynamic Kc approach by linking LAI field observations with remote sensing observations and by adding ground cover observations. |
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Series Issue |
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Edition |
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| ISSN |
2073-4441 |
ISBN |
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Medium |
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Expedition |
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Conference |
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| Notes |
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Approved |
no |
| Call Number |
THL @ christoph.kuells @ w14050734 |
Serial |
81 |
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| Author |
Eliades, M.; Bruggeman, A.; Djuma, H.; Christofi, C.; Kuells, C. |
| Title |
Quantifying Evapotranspiration and Drainage Losses in a Semi-Arid Nectarine (Prunus persica var. nucipersica) Field with a Dynamic Crop Coefficient (Kc) Derived from Leaf Area Index Measurements |
Type |
Journal Article |
| Year |
2022 |
Publication |
Water |
Abbreviated Journal |
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| Volume |
14 |
Issue |
5 |
Pages |
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| Keywords |
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| Abstract |
Quantifying evapotranspiration and drainage losses is essential for improving irrigation efficiency. The FAO-56 is the most popular method for computing crop evapotranspiration. There is, however, a need for locally derived crop coefficients (Kc) with a high temporal resolution to reduce errors in the water balance. The aim of this paper is to introduce a dynamic Kc approach, based on Leaf Area Index (LAI) observations, for improving water balance computations. Soil moisture and meteorological data were collected in a terraced nectarine (Prunus persica var. nucipersica) orchard in Cyprus, from 22 March 2019 to 18 November 2021. The Kc was derived as a function of the canopy cover fraction (c), from biweekly in situ LAI measurements. The use of a dynamic Kc resulted in Kc estimates with a bias of 17 mm and a mean absolute error of 0.8 mm. Evapotranspiration (ET) ranged from 41% of the rainfall (P) and irrigation (I) in the wet year (2019) to 57% of P + I in the dry year (2021). Drainage losses from irrigation (DR_I) were 44% of the total irrigation. The irrigation efficiency in the nectarine field could be improved by reducing irrigation amounts and increasing the irrigation frequency. Future studies should focus on improving the dynamic Kc approach by linking LAI field observations with remote sensing observations and by adding ground cover observations. |
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Edition |
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2073-4441 |
ISBN |
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Expedition |
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Conference |
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| Notes |
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Approved |
no |
| Call Number |
THL @ christoph.kuells @ w14050734 |
Serial |
85 |
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| Author |
Benites Lazaro, L.L.; Bellezoni, R.; Puppim de Oliveira, J.; Jacobi, P.R.; Giatti, L. |
| Title |
Ten Years of Research on the Water-Energy-Food Nexus: An Analysis of Topics Evolution |
Type |
Journal Article |
| Year |
2022 |
Publication |
Frontiers in Water |
Abbreviated Journal |
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| Volume |
4 |
Issue |
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Pages |
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no |
| Call Number |
THL @ christoph.kuells @ article |
Serial |
86 |
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| Author |
Abiye, T. |
| Title |
Synthesis on groundwater recharge in Southern Africa: A supporting tool for groundwater users |
Type |
Journal Article |
| Year |
2016 |
Publication |
Groundwater for Sustainable Development |
Abbreviated Journal |
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| Volume |
2-3 |
Issue |
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Pages |
182-189 |
| Keywords |
Arid and semi-arid areas, Groundwater recharge, Recharge estimation methods, Southern Africa |
| Abstract |
This synthesis on groundwater recharge targets the Southern African region as a result of the dependence of the community and economic sector on the groundwater resource. Several literature based recharge studies were collected and assessed in order to find out the main controls to the occurrence of recharge. The Water Table Fluctuation and Base flow separation methods have been tested in the catchment that drains crystalline basement rocks and dolostones close to the city of Johannesburg, South Africa. Based on the assessed data the Chloride Mass Balance method resulted in groundwater recharge of less than 4% of the rainfall, while it reaches 20%, when rainfall exceeds 600mm. For the classical water balance method, recharge proportion is less than 3% of rainfall as a result of very high ambient temperature in the region. Based on the Saturated Volume Fluctuation and Water Table Fluctuation methods, recharge could be less than 6% for annual rainfall of less than 600mm. Observational results further suggest that sporadic recharge from high intensity rainfall has important contribution to the groundwater recharge in the region, owing to the presence of permeable geological cover, which could not be fully captured by most of the recharge estimation methods. This study further documents an evaluation of the most reliable recharge estimation methods in the area such as the chloride mass balance, saturated volume fluctuation and water table fluctuation methods in order to successfully manage the groundwater resource. |
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Series Issue |
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Edition |
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| ISSN |
2352-801x |
ISBN |
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Expedition |
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Conference |
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| Notes |
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Approved |
no |
| Call Number |
THL @ christoph.kuells @ abiye_synthesis_2016 |
Serial |
101 |
| Permanent link to this record |
