Your search found 10 records
1 Wassmann, R.; Lantin, R. S.; Neue, H. U. (Eds.) 2000. Methane emissions from major rice ecosystems in Asia. Dordrecht, Netherlands: Kluwer. ix, 394p.
Rice ; Paddy fields ; Ecosystems ; Irrigated farming ; Rain-fed farming ; GIS ; Simulation models ; Cropping systems ; Land management ; Fertilizers / Philippines / China / India / Indonesia / Thailand / Korea Republic
(Location: IWMI-HQ Call no: 631.7.1 G570 WAS Record No: H032657)
2 Wassmann, R.; Vlek, P. L. G. (Eds.) 2004. Tropical agriculture in transition: Opportunities for mitigating greenhouse gas emissions? Dordrecht, Netherlands: Kluwer. 277p.
Agroforestry ; Agricultural research ; Pastoralism ; Rice ; Cropping systems ; Sugarcane ; Crop production ; Cotton ; Maize ; Sorghum ; Wheat ; Cassava ; Fertilizers ; Land use ; Agricultural policy ; Nitrogen ; Soil properties ; Soil management ; Soil moisture ; Soil temperature ; Livestock ; Climate ; Irrigation practices ; Labor ; Governance ; Financing ; Energy ; Deforestation ; Afforestation / Asia / USA / Africa / Brazil / Venezuela / Philippines / Amazonia
(Location: IWMI-HQ Call no: 630 G000 WASS Record No: H033889)
3 Wassmann, R.; Hien, N. X.; Hoanh, Chu Thai; Tuong, T. P. 2004. Sea level rise affecting the Vietnamese Mekong Delta: water elevation in the flood season and implications for rice production. Climatic Change, 66:89-107.
River basins ; Hydrology ; Models ; Rice ; Crop production ; Climate change ; Flood water ; Sea level ; Deltas / Vietnam / Mekong Delta
(Location: IWMI-HQ Call no: IWMI 333.91 G784 WAS Record No: H035796)
4 Wassmann, R.; Butterbach-Bah, K.; Doberman, A. 2007. Irrigated rice production systems and greenhouse gas emissions: Crop and residue management trends, climate change impacts and mitigation strategies. CAB Reviews: Perspectives in Agriculture, Veterinary Science, Nutrition and Natural Resources, 2(004). 14p.
Irrigated farming ; Rice ; Paddy fields ; Methane ; Nitrous oxide ; Carbon dioxide ; Climate change ; Cropping systems
(Location: IWMI HQ Call no: P 7960 Record No: H040447)
5 Mitra, S.; Wassmann, R.; Vlek, P. L. G. 2003. Global inventory of wetlands and their role in the carbon cycle. Bonn, Germany: Center for Development Research. 44p. (ZEF-Discussion Papers on Development Policy 64)
Wetlands ; Classification ; Surveys ; Climate change ; Carbon Cycle ; Water storage ; Groundwater recharge ; Soil properties ; Carbon ; Databases
(Location: IWMI HQ Call no: e-copy only Record No: H041352)
http://www.zef.de/fileadmin/webfiles/downloads/zef_dp/zef_dp64.pdf
https://vlibrary.iwmi.org/pdf/H041352.pdf
https://vlibrary.iwmi.org/pdf/H041352.pdf
6 Wollenberg, E.; Herrero, M.; Wassmann, R.; Neufeldt, H.; Vermeulen, S.; Rosswall, T.; Campbell, B.; Hellin, J.; Jarvis, A.; Challinor, A.; Snook, L.; Smakhtin, Vladimir; Kinyangi, J. 2012. Setting the agenda: climate change adaptation and mitigation for food systems in the developing world. Copenhagen, Denmark: CGIAR Research Program on Climate Change, Agriculture and Food Security (CCAFS). 18p. (CCAFS Working Paper 29)
Climate change ; Adaptation ; Policy ; Research ; Food security ; Living standards ; Economic development ; Developing countries
(Location: IWMI HQ Call no: e-copy only Record No: H045821)
http://cgspace.cgiar.org/bitstream/handle/10568/24914/CCAFSWorkingPaper29.pdf?sequence=1
https://vlibrary.iwmi.org/pdf/H045821.pdf
https://vlibrary.iwmi.org/pdf/H045821.pdf
(1.20 MB) (1.20MB)
New agricultural development pathways are required to meet climate change adaptation and mitigation needs in the food systems of low-income countries. A research and policy agenda is provided to indicate where innovation and new knowledge are needed. Adaptation requires identifying suitable crop varieties and livestock breeds, as well as building resilient farming and natural resources systems, institutions for famine and crop failure relief, and mechanisms for rapid learning by farmers. Mitigation requires transitioning to ‘low climate impact’ agriculture that reduces emissions while achieving food security, economic well-being and sustainability. Efficient interventions, incentives for large-scale shifts in practices, and monitoring systems are required. Integrated assessments of adaptation and mitigation are needed to better understand the synergies and trade-offs among outcomes.
7 Phong, N. D.; Hoanh, Chu Thai; Tuong, T. P.; Wassmann, R.. 2014. Sea level rise effects on acidic pollution in a coastal acid sulphate soil area. In Ames, D.P., Quinn, N.W.T., Rizzoli, A.E. (Eds.). Proceedings of the 7th International Congress on Environmental Modelling and Software, San Diego, California, USA, 15-19 June 2014. Manno, Switzerland: International Environmental Modelling and Software Society (iEMSs) 8p.
Sea level ; Salinity ; Acidity ; Water pollution ; Coastal area ; Acid sulphate soils ; Deltas ; Canals ; Models / Vietnam / Mekong River Delta / Bac Lieu Province
(Location: IWMI HQ Call no: e-copy only Record No: H046614)
http://www.iemss.org/sites/iemss2014/papers/iemss2014_submission_223.pdf
https://vlibrary.iwmi.org/pdf/H046614.pdf
https://vlibrary.iwmi.org/pdf/H046614.pdf
(0.39 MB) (397.30 KB)
Bac Lieu is a coastal province the Mekong River Delta (MRD), Vietnam. Aside from salinity intrusion from the sea, the province is strongly affected by acidic pollution as 58% of the area (250,000 ha) is overlaid with acid sulphate soil (ASS). Previous studies showed that the eminent sea level rise (SLR) would influence the hydrology and salinity of the canal networks in the province. This study, using the previously validated hydraulic and water quality model VRSAP-ACIDITY (Vietnam River Systems And Plains, coupled with ACIDITY Module), aimed at quantifying impacts of different SLR scenarios (SLR = 17, 30, 50, or 75 cm) on acidic pollution in the province. Under the present sea level, widespread acidic pollution (pH < 5) of surface water occurred at the start of the rainy season, due to leaching of acidity from canal embankments and fields in ASS. The acceleration of SLR reduced the area of acidic polluted water. The lessening in acidic pollution was attributed to (1) SLR that raised the water level in the Mekong River, increasing the amount of fresh water flowing into the study area; and (2) the amount of water drained out of the study area increased, bringing with its acidity. It concluded that SLR has a positive effect on acidic pollution in the ASS coastal area.
8 Sander, B. O.; Wassmann, R.; Siopongco, J. D. L. C. 2015. Mitigating greenhouse gas emissions from rice production through water-saving techniques: potential, adoption and empirical evidence. In Hoanh, Chu Thai; Johnston, Robyn; Smakhtin, Vladimir. Climate change and agricultural water management in developing countries. Wallingford, UK: CABI. pp.193-207. (CABI Climate Change Series 8)
Greenhouse gases ; Methane emission ; Nitrous oxide ; Crop production ; Flood irrigation ; Rice ; Water conservation ; Water management ; Farmers ; Wet season ; Dry season
(Location: IWMI HQ Call no: IWMI Record No: H047379)
(599 KB)
9 Janz, B.; Weller, S.; Kraus, D.; Racela, H. S.; Wassmann, R.; Butterbach-Bahl, K.; Kiese, R. 2019. Greenhouse gas footprint of diversifying rice cropping systems: impacts of water regime and organic amendments. Agriculture, Ecosystems and Environment, 270-271:41-54. [doi: https://doi.org/10.1016/j.agee.2018.10.011]
Greenhouse gas emissions ; Cropping systems ; Irrigation water ; Organic amendments ; Rice straw ; Agronomic practices ; Crop rotation ; Diversification ; Mung beans ; Maize ; Catch crops ; Methane emission ; Nitrous oxide ; Climatic change ; Green manures ; Residues / Philippines
(Location: IWMI HQ Call no: e-copy only Record No: H049124)
(3.06 MB)
Increasing water scarcity and Asia’s rapid economic and social development, specifically the growing demand for animal products and biofuels, is forcing farmers to transform their traditional lowland double-rice cropping systems [R-R] to mixed lowland-upland systems where upland crops such as aerobic rice [R-A] or maize [R-M] are grown instead of paddy rice during the dry period. Such changes have implications on the C and N cycling in the soil-plant system, including major shifts in soil greenhouse gas (GHG) emissions from CH4 to N2O once paddies are used for upland cropping. Moreover, soil organic carbon stocks are decreasing, thereby jeopardizing soil fertility. In this study, we investigated if straw residue incorporation and/or catch crop cultivation impairs the greenhouse gas footprint of diversifying rice cropping systems and thus, presents an alternative to open-field straw burning and intensive mineral N fertilization. For this, we calculate annual global warming potentials (GWP) and yield-scaled GWPs of three different rice systems (R-R: rice-rice, R-A: rice- aerobic rice, R-M: rice maize) without (control) or with additions of straw (+6 Mg ha-1 [S]) or + straw + mungbean as catch crop ([M + S]) on the basis of high-temporal-resolution GHG emissions (CH4 and N2O), and measurements of yield parameters. The field trial was carried out at the International Rice Research Institute (IRRI), Philippines, covering two full years. Although dry season N2O emissions increased twice- to threefold in the diversified systems (R-A, R-M), the strong reduction of CH4 emissions during this period resulted in significantly lower annual yield-scaled GWP as compared to the traditional R-R system. The same pattern was observed after application and incorporation of organic material (straw and mungbean), but led to higher substrate availability for methanogens during the following season. Therefore, the GWP was 9–39% higher in treatments including straw incorporation as compared to a control treatment without organic substrate amendments. Additional incorporation of mungbeans further increased GWPs, whereby the increment was highest in R-R rotation (88%) and lowest in R-M rotation (55%), with annual GHG emissions of 11.8 and 5.6 Mg CO2-eq ha-1, respectively. Our study shows that the yield-scaled GWP, as well as irrigation water demand, is lowest for rice-maize (R-M) cropping systems, followed by R-A and R-R systems. This ranking persists even with the incorporation of crop residues, a requirement for farmers as the ban of open-field burning is increasingly enforced. Our work also calls for a refinement of IPCC emission factors for lowland-upland rotations and the inclusion of the land-preparation period within the GHG balance of rice cropping systems.
10 Wassmann, R.; Phong, N. D.; Tho, T. Q; Hoanh, C. H.; Khoi, N. H.; Hien, N. X.; Vo, T. B. T.; Tuong, T. P. 2019. High-resolution mapping of flood and salinity risks for rice production in the Vietnamese Mekong Delta. Field Crops Research, 236: 111-120. [doi: https://doi.org/10.1016/j.fcr.2019.03.007]
Floodplains ; Salinity ; Agricultural production ; Paddy fields ; Rice ; Mapping ; Deltas ; Seasonal cropping ; Climate change ; Hydrological factors ; Risk analysis / Vietnam / Mekong Delta
(Location: IWMI HQ Call no: e-copy only Record No: H049182)
(3.98 MB)
The rationale for mapping hydrological risks in the Mekong River Delta (MRD) is the large extent of flood-affected and salinity-affected areas that severely constrain rice production. This new study on risk mapping expands previous approaches in depth (resolutions of 300 × 300 m and 1 h) and width (combining different types of maps). Data obtained with a hydrological model have been evaluated through four different methods of mapping individual attributes of risks that collectively comprise a comprehensive risk assessment for rice production: 1) Peak risk maps: These maps show the maximum water heights in a high-water year and maximum salinity concentrations in a low-water year. 2) Time-sequenced risk maps: The article provides hyperlinks to videos that encompass time-sequenced maps for the critical periods of floods (July-December in daily intervals) and salinity (March-April in hourly intervals) for all provinces. 3) Sustained risk maps (for rice): This approach is based on clearly defined thresholds of flood and salinity risks considering the duration of risk exposure at a given location. We have set thresholds for water heights exceeding 0.4 m and salinity concentrations above 2 g/l for 7 consecutive days to define start and end dates of sustained risks for rice. 4) Risk profile maps (for rice): The data on sustained risk have been aggregated at province level to calculate the geographic coverage of risk areas as compared with the total rice area. The rice area exposed to sustained flood risks in the MRD comprises 39% of the total rice area, which can be further subdivided into 24% with long (>three months), 12% with moderate (1–3 months), and 3% with short (1–4 weeks) risk duration. Likewise, the salinity-prone rice area accounts for 44% of the total rice area and can be subdivided into 31% with long, 8% with medium, and 5% with short risk duration. Finally, we have discussed the pros and cons of these different risk mapping methods in view of required adaptation strategies for rice production to cope with rapidly changing environmental conditions.
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