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| 1 | Physician-directed patient serf-management of left atria/ pressure in advanced chronic heart failure显示文摘 | Ritzema J Troughton R Melton I | 2010 | Circulation2010，121，9： | 1 |
| 2 | Direct left atrial pres- sure monitoring in severe heart failure : long-term sensor perform- ance显示文摘 | Troughton RW Ritzema J Eigler NL | 2011 | Cardiovasc Trasl Res2011，4，1： | 1 |
| 3 | Subsurface drain- age to combat waterlogging and salinity in irrigated lands in India: Lessons learned in farmers' fields 显示文摘 | Ritzema H P Satyanarayana T V Raman S | 2008 | Agricultural water manage- ment2008，95，： | 1 |
| 4 | Subsurface drainage to combat waterlogging and salinity in irrigated lands in India:Lessons learned in farmers’fields显示文摘 | RITZEMA H P SATYANARAYANA T V RAMAN S | 2008 | Agricultural Water Management2008，95，： | 1 |
| 5 | Subsurface drainage practices: from manual installation to large-scale implementation显示文摘 | RITZEMA H NIJLAND H CROON F | 2006 | Agricultural Water Management2006，86，12： | 1 |
| 6 | Subsurface drainage to combat waterlogging and salinity in irrigated lands in India: lessons learned in farmers' fields显示文摘 | Ritzema H Satyanarayana T V Raman S | 2008 | Agricultural Water Management2008，95，3： | 1 |
| 7 | Subsurface drainage practices: From manual installation to large-scale implementation显示文摘 | Ritzema H Nijland H Croon F | 2006 | Agricultural Water Management2006，86，12： | 1 |
| 8 | Subsurface drainage to combat waterlogging and sa linity in irrigated lands in India: Lessons learned in farmer fields显示文摘 | Ritzema H P Satyanarayana T V Raman S | 2008 | Agricultural Water Management2008，95，3： | 1 |
| 9 | Physician directed patient self-management of left atrial pressure in ad- vanced chronic heart failure显示文摘 | Ritzema J Troughton R Melton I | 2010 | Circulation2010，12，9： | 1 |
| 10 | A short course of oral amiodarone improves sinusrhythm mainte nance post-cardioversion foratrial fibrillation 显示文摘 | Boos C Ritzema J More R S | 2004 | Hear2004，90，9： | 1 |
| 11 | Physician-directed pa-tient self-management of left atrial pressure in advanced chronic heart failure显示文摘 | Ritzema J Troughton R Melton l | 2010 | Circulation2010，121，9： | 1 |
| 12 | Subsurface drainage practices: From manual installation to large-scale implemen- tation显示文摘 | Ritzema H P Nijland H J Croon F W | 2006 | Agricultural Water Management2006，86，12： | 1 |
| 13 | Direct left atrial pressure monitoring in ambulatory heart failure patients:initial experience with a new permanent implantahle device显示文摘 | Ritzema J Melton IC Ricbards AM | 2007 | Circulation2007，116，25： | 1 |
| 14 | Climate Warming and Water Management Adaptation for California显示文摘 | Stacy K. Tanaka Tingju Zhu Jay R. Lund Richard E. Howitt Marion W. Jenkins Manuel A. Pulido Mélanie Tauber Randall S. Ritzema Inês C. Ferreira | 2006 | Climatic Change (-)2006，，3： | 1 |
| 15 | Land drainage strategies to cope with climate change in the Netherlands 显示文摘 | Ritzema H P Stuyt L C P M | 2015 | Acta Agr Scand Section B--Soil Plant Science2015，65，1： | 1 |
| 16 | Subsurface drainage to combat waterlogging and salinity in irrigated lands in India:Lessons learned in farmers'fields显示文摘 | Ritzema H P Satyanarayana T V Raman S | 2008 | Agricultural Water Management2008，95，3： | 1 |
| 17 | Subsurface drainage practices: from manual installation to large-scale implemen- tation显示文摘 | Ritzema H P Nijland H J Croon F W | 2006 | Agricultural Water Management2006，86，12： | 1 |
| 18 | Direct left atrial pressure monitoring in severe heart failure:long-term sensor performance显示文摘 | Richard Troughton Ritzema J | | 0，，： | 1 |
| 19 | Sedimentation in small-scale irrigation schemes in Ethiopia:Its sources and management显示文摘Numerous irrigation schemes in sub-Saharan Africa(SSA)exhibit excessive sedimentation,resulting in underperformance and high maintenance costs.In the current study,a participatory monitoring program was used to investigate sediment causes and sources,measure the annual sediment load,and monitor desilting campaigns in two small scale irrigation schemes in Ethiopia,Arata-Chufa(100 ha)and Ketar(430 ha),for three years(2016-2018).Sedimentation quantities were huge,where the annual river sediment influx ranged from 220 m^(3)for the Arata-Chufa scheme to 1,741 m^(3)for the Ketar scheme.On average 0.3 m^(3)/m of sediment were removed from the main canal for Arata-Chufa costing 794 days of labor per year.In Ketar,sediment quantities were even greater:1.1 m^(3)/m was removed requiring 3,118days of labor per year.The sediment influx from the river source amounts to up to 95%for Arata-Chufa and moderately reaches 46%for Ketar,with the remainder of the sediment entering with overland erosion flows.Farmers reported increased sedimentation over time and difficulty paying operation and maintenance fees instead preferring to contribute labor for the desilting campaigns.Sedimentation management is fragile and mainly involves frequent desilting campaigns and unharmonized efforts to reduce overland sediment inflows.Factors contributing to sediment deposition include mild longitudinal bed slopes,the location of the intake,canal layout,and lack of canal banks for protection against surface water inflow in addition to sub-optimal canal operations.Excessive sedimentation is a major challenge resulting in underperformance of numerous irrigation schemes in SSA,and the stakeholders’lack of awareness of the sources of sedimentation is an underlying factor aggravating sedimentation problems.It is concluded that investigating the sources,extent,and types of sedimentation entering a small-scale irrigation scheme is the basis for reducing maintenance costs and for effective management of sedimentation problems. | Zerihun Anbesa Gurmu Henk Ritzema Charlotte de Fraiture Mekonen Ayana | 2022 | International Journal of Sediment Research2022，37，5： | 0 |
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