Surface water samples were collected from Langtang Lirung glacier outlet point to the Narayani river system in central Nepal
in order to investigate the role of elevation in the variation of chemistry along the drainage networks. The chemistry of
Langtang–Narayani river system was dominated by sulfide oxidation coupled with carbonate dissolution and weathering of silicate
minerals. Calcium and magnesium concentrations were relatively higher than other cations and the sum of both species strongly
correlated with alkalinity, supporting the dissolution of carbonate and dolomite as the dominant source for these ions. Aluminosilicate
minerals primarily as albite and anorthite appeared as dominant silicate minerals within the drainage basin. Bisiallitization
was the dominant type of weathering within the entire drainage system. Hydrogen ion concentration was lower in the low elevation
sites than in high elevation sites reflecting the more consumption of carbon dioxide in the low elevation sites due to enhanced
chemical weathering rates. Furthermore, major solutes like sum of base cations, silicon as well as alkalinity increased in
concentration in the lower elevation sites. All regulating factors appeared to be directly related to elevation and hence
elevation appeared to be the prime factor for the variation in chemical species along the Langtang–Narayani river system.
Toshiyuki Masuzawa: deceased. 相似文献
The majority of rural communities have limited agricultural development opportunities within the hills and mountains of Nepal. While the dominant development model, which focuses on technology transfer and the evolution of commercial production systems, is effective when access to inputs and markets enables farmers to produce and trade successfully, many communities are marginalised from development opportunities by poverty and poor infrastructure. Complementary development approaches that value, conserve, develop and market agrobiodiversity could alleviate the extreme poverty where these conditions prevail as in the hills and mountains, the rural margins of Nepal. Formalised in situ approaches to agrobiodiversity conservation are in their infancy in Nepal, yet suggest that opportunities exist for a complementary agricultural development approach in the rural margins based on working with the local diversity, rather than its elimination. The obstacles of widespread poverty and inadequate infrastructure ensure that effective in situ agrobiodiversity conservation programs must provide for the needs of local people for sustainable development. 相似文献
The Agriculture, forestry and other land use (AFOLU) sector as a whole accounts for more than 80% of the total greenhouse gas (GHG) emission in Nepal. This study estimates the GHG emissions from the AFOLU sector in the business as usual (BAU) case during 2010–2050 and identifies the economically attractive countermeasures to abate GHG emissions from the sector at different carbon prices. It also estimates the carbon price elasticity of GHG abatement from the sector. The study finds that enteric fermentation processes in the livestock and emissions from agricultural soils are the two major contributors of GHG emission in AFOLU sector. It identifies no-regret abatement options in the AFOLU sector that could mitigate about 41.5% of the total GHG emission during 2016–2050 in the BAU scenario. There would be a net cumulative carbon sequestration of 16 million tonnes of carbon dioxide equivalent (MtCO2e) at $10 per tonne of carbon dioxide equivalent (tCO2e) during the period. Carbon price above $75/tCO2e is not found to be much effective in achieving significant additional reduction in GHG emissions from the AFOLU sector. 相似文献
Reducing Emissions from Deforestation and forest Degradation (REDD+) is a global climate change mitigation strategy. Under the proposed REDD+ framework, financial incentives are provided, primarily to developing countries, for forest conservation to reduce carbon emissions. Projects labelled as REDD are being implemented in a wide variety of settings in different countries. Developing an effective benefit-distribution mechanism between implementing agencies and local communities is a key challenge for the implementation of REDD+. We examined whether the REDD+ payment mechanism adopted in a REDD+ pilot project in Nepal is beneficial to the local forest users. We estimated economic contribution of the REDD+ payments to the total household income, calculated the role of payment in reducing income inequality at the household level and examined socio-economic heterogeneity represented by wealth and ethnicity among the payment recipient households. REDD+ payment provided economic benefits to the poorest households but the economic contribution of the payment to the household economy is very nominal and is insufficient to invest in livelihood enhancement activities. REDD+ payment to some extent helps to reduce income inequality among the households. Social heterogeneity of a household overshadowed household wealth status during the payment distribution among the sampled households creating social tension. Therefore, either alternative payment models or investment in community projects might yield better outcomes. 相似文献
Community forestry in Nepal vests rights of access, use, exclusion, and management of national forestland to local user groups. There is strong potential for community forests to serve as the basis for improving the quality of life and the status of livelihoods in rural Nepal while conserving forest resources. Frequently, community forest user groups are dominated by local elites who choose to close access to community forestland for several years. As a result, forest conditions are improving, but the poorest households bear the cost of strict protection. In this paper I argue that community forestry is thus having rather limited success at improving rural livelihoods. Although community forestry is fairly successful at conservation, there remain huge wealth disparities between community forest member households, limited access to vital forest products, and significant power disparities within community forest user groups. Such conditions of inequity, reinforced by current community forestry policy and practice, severely challenge the development potential of community-controlled natural resources. In Nepal, overcoming these challenges may require a change in policy that mandates more inclusive local decision-making. 相似文献
This paper takes up the proposition that institutions mediate market formation, through a comparative study of rural finance in Nepal and Vietnam. It explores how microfinance, as an iconic institution of ‘roll-out neoliberalism’, articulates political-economic and cultural-political milieux—with particular emphasis given to the ways in which the Vietnamese Party-state has engaged rural finance to further the socialist transition even as it has undergone significant ‘economic renovation’. In so doing, the paper adopts a processual interpretation of institutions not as bounded structures, but as arenas of ongoing debate over culturally constructed meanings and ‘practices of assemblage’ [Li, T.M., 2007a. Practices of assemblage and community forest management. Economy and Society 36 (2), 263–293] that are inextricably linked with wider-scale political-economic and cultural-political formations. A comparative approach is pursued here to emphasize spatio-temporal contingencies in the articulation of a market-led development institution with specific national regulatory frameworks and political cultures. A critical-geographical orientation helps to deepen Polanyi’s proposition that the economy is an instituted process, to challenge the prevailing binary opposition between state- and market-led development, account for the multiple scales at which power and interest reside in the formation of markets, and highlight the variable ways in which markets are embodied and enacted in particular places. 相似文献
As developing countries around the world formulate policies to address climate change, concerns remain as to whether the voices of those most exposed to climate risk are represented in those policies. Developing countries face significant challenges for contextualizing global-scale scientific research into national political dynamics and downscaling global frameworks to sub-national levels, where the most affected are presumed to live. This article critiques the ways in which the politics of representation and climate science are framed and pursued in the process of climate policy development, and contributes to an understanding of the relative effectiveness of globally framed, generic policy mechanisms in vulnerable and politically volatile contexts. Based on this analysis, it also outlines opportunities for the possibility of improving climate policy processes to contest technocratic framing and generic international adaptation solutions.
Policy relevance
Nepal's position as one of the countries most at risk from climate change in the Himalayas has spurred significant international support to craft climate policy responses over the past few years. Focusing on the National Adaptation Programme of Action (NAPA) and the Climate Change Policy, this article examines the extent to which internationally and scientifically framed climate policy in Nepal recognizes the unfolding political mobilizations around the demand for a representative state and equitable adaptation to climate risks. This is particularly important in Nepal, where political unrest in the post-conflict transition after the end of the civil war in 2006 has focused around struggles over representation for those historically on the political margins. Arguing that vulnerability to climate risk is produced in conjunction with social and political conditions, and that not everyone in the same locality is equally vulnerable, we demonstrate the multi-faceted nature of the politics of representation for climate policy making in Nepal. However, so far, this policy making has primarily been shaped through a technocratic framing that avoids political contestations and downplays the demand for inclusive and deliberative processes. Based on this analysis, we identify the need for a flexible, contextually grounded, and multi-scalar approach to political representation while also emphasizing the need for downscaling climate science that can inform policy development and implementation to achieve fair and effective adaptation to climate change. 相似文献
New structural and tectono‐metamorphic data are presented from a geological transect along the Mugu Karnali valley, in Western Nepal (Central Himalaya), where an almost continuous cross‐section from the Lesser Himalaya Sequence to the Everest Series through the medium‐high‐grade Greater Himalayan Sequence (GHS) is exposed. Detailed meso‐ and micro‐structural analyses were carried out along the transect. Pressure (P)–temperature (T) conditions and P–T–deformation paths for samples from different structural units were derived by calculating pseudosections in the MnNKCFMASHT system. Systematic increase of P–T conditions, from ~0.75 GPa to 560 °C up to ≥1.0 GPa–750 °C, has been detected starting from the garnet zone up to the K‐feldspar + aluminosilicate zone. Our investigation reveals how these units are characterized by different P–T evolutions and well‐developed tectonic boundaries. Integrating our meso‐ and micro‐structural data with those of metamorphism and geochronology, a diachronism in deformation and metamorphism can be highlighted along the transect, where different crustal slices were underthrust, metamorphosed and exhumed at different times. The GHS is not a single tectonic unit, but it is composed of (at least) three different crustal slices, in agreement with a model of in‐sequence shearing by accretion of material from the Indian plate, where coeval activity of basal thrusting at the bottom with normal shearing at the top of the GHS is not strictly required for its exhumation. 相似文献