Your search found 47 records
1 Maglinao, A. R.; Manzanilla, D. O.; Chandrapatya, S. 2005. Performance evaluation and impact assessment of the ASIALAND Network: Management of Sloping Lands for Sustainable Agriculture Project – Phase 5, 2001-2004. Report submitted to the Swiss Agency for Development and Cooperation (SDC) and to the International Water Management Institute (IWMI). xii, 103p. + appendices.
Sustainable agriculture ; Land management ; Sloping land ; Soil conservation ; Agricultural extension ; Farmers ; Development projects ; Performance evaluation / China / Indonesia / Laos / Malaysia / Philippines / Thailand / Vietnam
(Location: IWMI HQ Call no: IWMI 630 G570 MAG Record No: H038300)
2 Al-Azab, T.; Abu Sirhan, A. 2006. Drip irrigation system for steep slope land. Journal of Food, Agriculture & Environment, 4(1):301-303.
(Location: IWMI-HQ Call no: P 7507 Record No: H038483)
3 Rumpel, C.; Chaplot, V.; Planchon, O.; Bernadou, J.; Valentin, Christian; Mariotti, A. 2006. Preferential erosion of black carbon on steep slopes with slash and burn agriculture. Catena, 65(1):30-40.
(Location: IWMI-HQ Call no: IWMI 631.45 G708 RUM Record No: H038783)
4 IBSRAM. 1999. The management of sloping lands in Asia. Bangkok, Thailand: IBSRAM. 169p. (IBSRAM network document n0.24)
Land management ; Sloping land ; Erosion ; Runoff ; Models ; Sustainable agriculture ; Farmers ; Farming systems ; Labor / Asia / China / Indonesia / Laos / Malaysia / Philippines / Thailand / Vietnam
(Location: IWMI-HQ Call no: 631.4 G570 IBS Record No: H039458)
5 Phien, T.; Dixin, Y.; Santoso, D.; Manzanilla, D.; Chandrapatya, Suraphol. 2005. The regional assessment of selected conservation measures introduced by the ASIALAND Sloping Lands Network. In Kheoruenromne, I.; Riddell, J. A.; Soitong, K. (Eds.). Proceedings of SSWM 2004 International Conference on Innovative Practices for Sustainable Sloping Lands and Watershed Management, Chiang Mai Hill Hotel, Chiang Mai, Thailand, 5-9 September 2004. Bangkok, Thailand: Department of Agricultural Extension. pp.70-86.
Land management ; Sloping land ; Erosion ; Farmer participation ; Cropping systems / China / Laos / Indonesia / Malaysia / Philippines / Thailand / Vietnam
(Location: IWMI HQ Call no: IWMI 631.45 G570 PHI, 333.91 G570 KHE Record No: H040244)
6 Wapet, S.; Chandrapatya, Suraphol; Buranatanung, N. 2005. Factors affecting the adoption and non-adoption of sloping land conservation farming practices by small-scale farmers in Thailand. In Kheoruenromne, I.; Riddell, J. A.; Soitong, K. (Eds.). Proceedings of SSWM 2004 International Conference on Innovative Practices for Sustainable Sloping Lands and Watershed Management, Chiang Mai Hill Hotel, Chiang Mai, Thailand, 5-9 September 2004. Bangkok, Thailand: Department of Agricultural Extension. pp.257-267.
Cropping systems ; Sloping land ; Erosion ; Farmer participation ; Agricultural extension ; Soil degradation ; Soil conservation ; Farmers / Thailand
(Location: IWMI HQ Call no: IWMI 630 G750 WAP, 333.91 G570 KHE Record No: H040246)
7 Phonkarm, R.; Chandrapatya, Suraphol; Makin, Ian. 2005. The web-based extension channel: a decision support tool for sloping land conservation and management technology transfer for selective adoption by farmers. In Kheoruenromne, I.; Riddell, J. A.; Soitong, K. (Eds.). Proceedings of SSWM 2004 International Conference on Innovative Practices for Sustainable Sloping Lands and Watershed Management, Chiang Mai Hill Hotel, Chiang Mai, Thailand, 5-9 September 2004. Bangkok, Thailand: Department of Agricultural Extension. pp.280-291.
Sloping land ; Erosion ; Soil conservation ; Land management ; Databases ; Technology transfer ; Farming systems ; Decision support tools ; Computer techniques ; Agricultural extension
(Location: IWMI HQ Call no: IWMI 631.45 G800 PHO, 333.91 G570 KHE Record No: H040247)
8 Vigiak, Olga; Ribolzi, O.; Pierret, A.; Sengtaheuanghoung, O.; Valentin, Christian. 2008. Trapping efficiencies of cultivated and natural riparian vegetation of northern Laos. Journal of Environmental Quality, 37: 889–897.
Riparian vegetation ; Sedimentation ; Rivers ; Runoff ; Control methods ; Sloping land ; Cultivation ; Rice ; Vegetables ; Teak ; Bananas ; Bamboos / Laos / Houay Pano Catchment
(Location: IWMI HQ Call no: IWMI 631.7.5 G708 VIG Record No: H040503)
In northern Laos, intensification of cultivation on sloping land leads to accelerated erosion processes. Management of riparian land may counteract the negative impacts of higher sediment delivery rates on water quality. This study assessed water and sediment concentration trapping efficiencies of riparian vegetation in northern Laos and the effect of cultivation of riparian land on water quality. Runoff flowing in and out of selected riparian sites was monitored by means of open troughs. In 2005, two native grass, two bamboo, and two banana sites were monitored. In 2006, adjacent to steep banana, bamboo, and native grass sites, three upland rice sites were established and monitored. Water trapping efficiency (WTE) and sediment concentration trapping efficiency (SCTE) were calculated on an event basis; means and 95% confi dence intervals (CIs) were estimated with a bootstrapping approach. Confidence intervals were large and overlapping among sites. Seepage conditions severely limited trapping efficiency. Native grass resulted in the highest WTE (95% CI, -0.10 to 0.23), which was not significantly different from zero. Banana resulted in the highest SCTE (95% CI, 0.06–0.40). Bamboo had negative WTE and SCTE. Median outflow runoff from rice sites was nine times the inflow. Median outflow sediment concentration from rice sites was two to five times that of their adjacent sites and two to five times the inflow sediment concentration. Although lowtillage banana plantation may reduce sediment concentration of runoff, cultivation of annual crops in riparian land leads to delivery of turbid runoff into the stream, thus severely affecting stream water quality.
9 Chaplot, V.; Khampaseuth, X.; Valentin, Christian; Le Bissonnais, Y. 2007. Interrill erosion in the sloping lands of northern Laos subjected to shifting cultivation. Earth Surface Processes and Landforms, 32(3):415-428.
Erosion ; Runoff ; Soil crusts ; Soil properties ; Shifting cultivation ; Sloping land ; Runoff ; Land use ; Land management / South East Asia / Laos
(Location: IWMI HQ Call no: IWMI 631.45 G708 CHA Record No: H040754)
In this study our main objective was to quantify water interrill erosion in the sloping lands of Southeast Asia, one of the most bio-geochemically active regions of the world. Investigations were performed on a typical hillslope of Northern Laos subjected to slash and burn agriculture practiced as shifting cultivation. Situations with different periods of the shifting cultivation cycle (secondary forest, upland rice cultivation following a four-year fallow period and three-year continuous upland rice cultivation) and soil orders (Ultisols, Alfisols, Inceptisols) were selected. One metre square micro-plots were installed to quantify the soil material removed by either detachment of entire soil aggregate or aggregate destruction, and the detached material transported by thin sheet flow, the main mechanisms of interrill erosion. In addition, laboratory tests were carried out to quantify the aggregate destruction in the process of water erosion by slaking, dispersion and mechanical breakdown. The average runoff coefficient (R) evaluated throughout the 2002 rainy season was 30·1 per cent and the interrill erosion was 1413 g m-2 yr-1 for sediments and 68 g C m-2 yr-1 for soil organic carbon, which was relatively high. Among the mechanisms of interrill water erosion, aggregate destruction was low and mostly caused by mechanical breakdown due to raindrops, thus leading to the conclusion that detachment and further transport by the shallow runoff of macro-aggregates predominates. R ranged from 23·1 to 35·8 per cent. It decreased with the proportion of mosses on the soil surface and soil surface coverage, and increased with increasing proportion of structural crust, thus confirming previous results. Water erosion varied from 621 to 2433 g m-2 yr-1 for sediments and from 31 to 146 g C m-2 yr-1 for soil organic carbon, and significantly increased with increasing clay content of the surface horizon, probably due to the formation of easily detachable and transportable sand-size aggregates, and proportion of macro-aggregates not embedded in the soil matrix and prone to transport. In addition, water erosion decreased with increasing proportion of structural crusts, probably due to their higher hardness, and when cultivation follows a fallow period rather than after a long period of cultivation due to the greater occurrence of algae on the soil surface, which affords physical protection and greater aggregate stability through binding and gluing. This study based on simultaneous field and laboratory investigations allowed successful identification and quantification of the main erosion mechanisms and controlling factors of interrill erosion, which will give arguments to further set up optimal strategies for sustainable use of the sloping lands of Southeast Asia.
10 Phan, Ha Hai An; Orange, Didier; Huon, S.; Henry des Tureaux, Thierry; Pham Van Rinh; Tran, Thi My Linh; Podwojewski Pascal. 2007. Evolution des teneurs en carbone organique et azote dans les matieres en suspension des eaux de surface d’un petit bassin versant agricole sur pente dans le Nord Vietnam. In French. [Organic carbon and nitrogen contents in the suspended matters of surface waters within a small agricultural watershed on sloping lands in Northern Vietnam]. Gestion integree des eaux et des sols : ressources, amenagements et risques en milieux ruraux et urbains, Editions AUF et IRD, Hanoi, Actes des Premieres Journees Scientifiques Inter-Reseaux de l’AUF, Hanoi, 6-9 novembre 2007. 6p.
(Location: IWMI HQ Record No: H040805)
This study deals with the organic carbon concentration and nitrogen concentration inside the suspended particulate matter transported by the small rivers with a watershed area below 10 ha and totally enclosed on sloping lands. The scientific purpose is to determine if these two components of soil losses from erosion process on topsoil could be used as tracers for the organic matter to point out the surface water pathway during one peak flow. The fluctuations in POC content, in C/N rate and in ?13C isotopic rate are no linked with the vegetation species on the sloping land during the process of surface runoff until the runoff collect in the small stream. However their absolute values are characteristic of each kind of vegetation cover. Then our results allow assuming that the mix of chemical tracers such as pH, water conductivity, organic carbon and nitrogen content in sediment with the associate measurements of ?13C isotopic component can be used to analyze the surface water pathway within a small sloping watershed during one peak flow. The next step will be the calculation of hydrological components of the hydrogram in relationship with the water pathway by the mixed equation use applied to the ?13C isotopic component of the organic matter form the sediments and from their corresponding soils.
11 Orange, Didier; Phan, Ha Hai An; Lequeux, Brice; Henry des Tureaux, Thierry; Pham, Van Rinh; Toan, T. D. 2007. Charges de fond et suspensions transportees par les eaux d’ecoulement dans un petit bassin versant agricole sur pentes dans le Nord Vietnam. Gestion integree des eaux et des sols : ressources, amenagements et risques en milieux ruraux et urbains, Editions AUF et IRD, Hanoi, Actes des Premieres Journees Scientifiques Inter- Reseaux de l’AUF, Hanoi, 6-9 novembre 2007; Paper presented at Conference, Integrated Management of Waters and Soils: resources, infrastructures and risks in rural and urban areas, Hanoi, Vietnam, 6-9 November 2007. 6p.
(Location: IWMI HQ Call no: 333.91 G784 ORA Record No: H040807)
A small agricultural watershed on sloping lands (around 50 ha) in Northern Vietnam is equipped with 5 runoff measurement stations named weir. Each weir is representative of one vegetation cover (forest, fodder, cassava and old fallow). There is no relationship between bed load and rainfall amount due to a threshold process, but it is directly linked to the vegetation cover. In 2006, bed load losses are quite much important on the cassava crop (879 kg/ha/yr) than at the other weirs: 131 kg/ha/yr for old fallow, 83 kg/ha/yr for pluriannual plantation and 52 kg/ha/yr for forest. From some event measurements, the mean suspended load during the rising peak was a range 0.4-2.9 g/l with a SM peak around 3 to 8 g/l; the suspended load during the base flow was around 10-20 mg/l. It is impossible to predict the SM load with the discharge. For each weir, the best correlation is between SM load and Rindex emphasizing the duration and the amount of the rain event. The calculation of suspended load confirms the soil loss by suspended load is much more important than by bed load, even if the 95% of suspended load occurs during the peak events. On the whole watershed, the erosion amount by suspended load is 1.2 t/ha for 0.6 t/ha for bed load. More trees are in the basin, less is the suspended load; and at the opposite, the agricultural practices increase the amount of suspended load.
12 Orange, Didier; Bardouin, L.; Nguyen, D. P.; Loiseau, J. B.; Clement, Floriane; Jouquet, Pascal. 2007. Le concept de PES pour une gestion durable des eaux et des sols: application au developpement de l’elevage et au controle environnemental dans le Nord Vietnam. In French. Gestion integree des eaux et des sols : ressources, amenagements et risques en milieux ruraux et urbains, Editions AUF et IRD, Hanoi, Actes des Premieres Journees Scientifiques Inter- Reseaux de l’AUF, Hanoi, 6-9 novembre 2007; Paper presented at Conference, Integrated Management of Waters and Soils: resources, infrastructures and risks in rural and urban areas, Hanoi, Vietnam, 6-9 November 2007. 8p.
(Location: IWMI HQ Call no: 333.91 G784 ORA Record No: H040808)
In Northern Vietnam, the urgent environmental problems are soil erosion under annual crop on sloping lands leading to a drastic soil fertility decrease, inducing the risk to unfertilize the flatlands and to fill up the water reservoirs in the downstream part by sediment accumulation. Then a lack of disposable income for the purchase of inorganic fertilizers has resulted in farmers in Northern Vietnam resorting to the utilization of raw animal and human waste in order to fertilizer their cropping systems. This project is dealing at the District level in the Northward of Hoa Binh Province with the PES use (agro-ecological concept of Payment for Environmental Services) based on a new market opportunity for the farmers of Northern Vietnam to mobilise the integrated cattle husbandry enhancement and water management between uplands and lowlands. The purpose is to create a sustainable loop between fodder cropping on sloping lands, the cattle development under stables, the animal and human waste management, leading to human health and water quality protections, to the erosion sediment control for both a sustainable upland and lowland use. The proposed project offers a novel approach in that a holistic approach is introduced to achieve income generation from livestock manure management in mountainous environment of Southeast Asia in establishing a process of comprehensive assessment, of mutual learning between farmers from upper part and down part of the watershed through a hydrological modelling platform, and by the development of new agricultural technologies as biogas digester and vermicompost unit.
13 Phai, D. D.; Orange, Didier; Migraine, J. B.; Toan, Tran Duc; Vinh, N. C. 2007. Applying GIS-assisted modelling to predict soil erosion for a small agricultural watershed within sloping lands in Northern Vietnam. Paper presented at the 2nd International Conference on “Sustainable Sloping Lands and Watershed Management”, LuangPhrabang, Laos. 12-15 December 2006. pp. 212-228.
(Location: IWMI HQ Call no: IWMI 631.45 G784 PHA Record No: H040813)
GIS-assisted distributed modelling is particularly useful for supplying information to decision-makers regarding land-use, water management and environmental protection. This study deals with the prediction of soil losses by a simple distributed and GIS-assisted model within a small experimental agricultural watershed on sloping lands in northern Vietnam (<1 km2). The Predict and Localise Erosion and Runoff (PLER) model predicts the spatial and temporal distribution of soil erosion rates; thus it can be used to identify erosion hot spots in a watershed. The model has been built specifically to take into account steep slopes. It is a conceptual erosion model on a physical base. Indeed, the model imitates soil erosion as a dynamic process which includes three phases: i) detachment, ii) transport and iii) deposition. In this study the PLER model was used for two complete years, 2003 and 2004. The disparity for the soil erosion quantity between the experiment and the run model was 5.1% in 2003 and 4.9% in 2004, even though these two years had a very different annual amount of rain. Indeed, 40% of the rainfall events were of a strong intensity (>75 mm hr-1) in 2003 as apposed to only 4% in 2004. The amount of rainfall in 2003 and 2004 was 1,583 mm and 1,353 mm, respectively. The PLER model took into account this discrepancy in the rainfall characteristics between the two years. Between April to September, the disparity fluctuates between just 4.7%-5.3%. The maps drawn by the PLER model underline that the erosion process occurs mainly at the top of the landscape and highlights a different behaviour for detachability and soil erosion between the western and the eastern parts of the studied watershed.
14 Orange, Didier; Toan, Tran Duc; Salgado, P.; Phuong, N. D.; Van Thiet, N.; Clement, Floriane; Binh, L. H. 2008. Different interests, common concerns and shared benefits. LEISA Magazine, 24(2):12-13.
Soil management ; Erosion ; Control methods ; Villages ; Land management ; Sloping land ; Decision making ; Farmer participation ; Farming systems ; Crop production ; Fodder ; Development projects / Vietnam / Hoa Binh Province
(Location: IWMI HQ Call no: IWMI 631.45 G784 ORA Record No: H041495)
http://www.leisa.info/index.php?url=getblob.php&o_id=209097&a_id=211&a_seq=0
https://vlibrary.iwmi.org/pdf/H041495.pdf
https://vlibrary.iwmi.org/pdf/H041495.pdf
Getting farmers to adopt new technologies to address soil erosion and fertility problems is not easy. In Vietnam, a multidisciplinary research project to improve soil management in traditional mountainous agricultural farming systems managed to attract farmers’ interest and stop soil erosion. This success stems from encouraging farmers, extensionists and researchers to jointly define and implement the project. Their different aims could be followed simultaneously: scientific results for researchers, better agricultural practice for extension workers, and economic success and free choice for farmers.
15 Podwojewski, P.; Orange, Didier; Jouquet, Pascal; Valentin, C.; Nguyen, V. T.; Janeau, J. L.; Toan, T. D. 2008. Land-use impacts on surface runoff and soil detachment within agricultural sloping lands in northern Vietnam. Catena, 74:109-118.
Surface runoff ; Land use ; Sloping land ; Cassava ; Eucalyptus ; Fodder ; Environmental degradation ; Catchment areas ; Soil properties ; Vegetation / Vietnam
(Location: IWMI HQ Call no: IWMI 631.4 G784 POD Record No: H041496)
16 Valentin, Christian; Agus, F.; Alamban, R.; Boosaner, A.; Bricquet, J. P.; Chaplot, V.; de Guzman, T.; de Rouw, A.; Janeau, J. L.; Orange, Didier; Phachomphonh, K.; Phai, Do Duy; Podwojewski, P.; Ribolzi, O.; Silvera, N.; Subagyono, K.; Thiebaux, Jean-Pierre; Toan, Tran Duc; Vadari, T. 2008. Runoff and sediment losses from 27 upland catchments in Southeast Asia: impact of rapid land use changes and conservation practices. Agriculture, Ecosystems and Environment, 128:225-238.
Runoff ; Sedimentation ; Catchment areas ; Land use ; Erosion ; Upland rice ; Maize ; Cassava ; Shifting cultivation ; Farming systems ; Soil conservation ; Sloping land / Southeast Asia / Indonesia / Laos / Philippines / Thailand / Vietnam
(Location: IWMI HQ Call no: IWMI 631.45 G800 VAL Record No: H041507)
17 World Bank, Agriculture and Rural Development Department. 2008. Managing land and landscapes: a sourcebook. (p.202 - on IWMI's research) Web ed. Washington, DC, USA: World Bank. 216p.
Land management ; Sustainability ; Water resource management ; Investment ; Farming systems ; Rainfed farming ; Sloping land ; Livestock ; Pastoralism ; Watershed management ; Climate change ; Risk management ; Land degradation ; Monitoring ; River basin development ; River basin management
(Location: IWMI HQ Call no: e-copy only Record No: H041520)
http://siteresources.worldbank.org/INTARD/927371-1113808366186/21649410/January2008WebEdition.pdf
https://vlibrary.iwmi.org/pdf/H041520.pdf
https://vlibrary.iwmi.org/pdf/H041520.pdf
This Sourcebook is intended as a ready reference for practitioners (including World Bank stakeholders and clients in borrowing countries as well as Bank project leaders) seeking information on the state of the art about good land management approaches and innovations for investments, and close monitoring for potential scaling up.
18 Rumpel, C.; Chaplot, V.; Chabbi, A.; Largeau, C.; Valentin, Christian. 2008. Stabilisation of HF soluble and HCl resistant organic matter in sloping tropical soils under slash and burn agriculture. Geoderma, 145:347-354.
Sloping land ; Shifting cultivation ; Tropical soils ; Climatic soil types ; Erosion ; Soil profiles / Laos / Luang Prabang
(Location: IWMI HQ Call no: IWMI 631.4 G708 RUM Record No: H041554)
19 Phai, D. D.; Orange, Didier; Migraine, J. B.; Toan, T. D.; Vinh, N. C. 2007. Applying GIS-assisted modelling to predict soil erosion for a small agricultural watershed within sloping lands in Northern Vietnam. In Gebbie, L.; Glendinning, A.; Lefroy-Braun, R.; Victor, M. (Eds.). Proceedings of the International Conference on Sustainable Sloping Lands and Watershed Management: Linking Research to Strengthen upland Policies and Practices, National Agriculture and Forestry Research Institute of Lao PDR (NAFRI), Vientiane, Lao PDR, 2007. Vientiane, LAO PDR: National Agriculture and Forestry Research Institute of Lao PDR (NAFRI) pp.212-228.
(Location: IWMI HQ Call no: IWMI 333.91 G784 PHA Record No: H041518)
20 Dupin, B.; de Rouw, A.; Phantahvong, K. B.; Valentin, Christian. 2009. Assessment of tillage erosion rates on steep slopes in northern Laos. Soil and Tillage Research, 103(1):119-126. [doi: https://doi.org/10.1016/j.still.2008.10.005]
Tillage ; Erosion ; Shifting cultivation ; Upland rice ; Weed control ; Farming systems ; Sloping land ; Subsistence farming / Laos / Houay Pano Catchment / Luang Prabang District
(Location: IWMI HQ Call no: e-copy only Record No: H041849)
(0.58 MB)
In the hills of south-east Asia shifting cultivation is developing towards more permanent cropping systems. In association with short fallow periods, fields suffer from weed pressure and this, in turn, leads to more frequent and deeper manual tillage. Due to steep slopes these operations induce tillage erosion. Measurements of such soil losses under on-farm conditions are still scarce. In this study tillage erosion was assessed and a predictive model of tillage erosion was established based on slope angle and contact cover, i.e. basal crop area and weed cover. The experiments were conducted in the Houay Pano, Northern Laos. The farmers cultivate annual crops in rotation with 1–3 year fallow periods without external inputs and using only hand tools. Tillage erosion was assessed using the tracer method across nine slope classes (0.30–1.10 m m1) for two crops, upland rice and Job’s tears (Coix lacryma-jobi L.). Soil movement due to land preparation and weeding were assessed separately because different tools are used, a medium size hoe and a small curved hoe. A multivariate regression showed a highly significant relation (R2 = 0.83) between soil losses due to land preparation, slope gradient and contact cover. Predicting models of soil losses due to weeding were also highly significant (R2 = 0.79 for upland rice, R2 = 0.88 for Job’s tears), confirming the importance of tillage erosion on steep slopes (4, 6 and 11 t ha1 year1 on slopes with gradients of 0.30, 0.60 and 0.90 m m1, respectively). Tillage erosion has increased exponentially over the last 40 years because of weed invasion associated with short fallow periods; the initially no-till system has changed into a system heavily dependent on tillage to control weeds and this greatly contributes to soil degradation.
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