catchment management
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2021 ◽  
Author(s):  
Patricia Mumbi Wambua

Catchment degradation has continued to occur globally albeit the presence of Community Forest Associations (CFA) and Water Resource Users Associations (WRUA). Similarly, Kilungu catchment area in Kenya is under the management of the Kenze (CFA) and upper Kaiti (WRUA). This paper examined Kenze CFA and Upper Kaiti WRUA activities by exploring their effectiveness in discharging their statutory functions. This was achieved by carrying out, an exploratory descriptive survey. Data was collected through questionnaires, focus group discussions, 10 key informants’ interviews and direct observations. Descriptive analysis was used. Information was presented in fig.s, tables and percentages. Results showed that upper Kaiti WRUA as more effective in catchment management at moderately (31%) and highly at (37%) as compared to CFA moderately (29%) and highly (5%). In terms of discharging of their statutory functions, Upper Kaiti WRUA was better at a rating of 27% (good) and 23% (very good) as compared to Kenze CFA which was rated at 3% (good) and 6% (very good). This study results implied that Upper Kaiti WRUA was more effective in all aspects of ensuring catchment management as opposed to CFA. In conclusion, a strategy of seizing the opportunities presented by the CFA of being empowered to perform all its activities as required by law with emphasis on the timely preparation and implementation of management plans and WRUA’s continuous improvement should be prioritized. The study recommends new initiatives that improve on the CFA and WRUA activities in order to effectively discharge on their statutory functions.


2021 ◽  
Author(s):  
Andrew Vinten ◽  
Iain D.M. Gunn

The “Water for All” project has aimed to develop a multi-disciplinary science case for adaptive management through a Payment for Ecosystem Services (PES) scheme in the Lunan Water, a lowland catchment in Scotland. Management needs for high and low flows, standing water levels and flow routing to/from high nature value mesotrophic wetlands were appraised. A key part has been the development of a real time hydrological-hydraulic model of the upper Lunan Water as an aid to management and scenario analysis especially with respect to existing and potential hydraulic structures. This provides better working knowledge and forecast-based simulations of high or low flow situations for catchment management planners, farmers, riparian owners and other local stakeholders. Engagement with local users and residents has included surveying Willingness To Pay (WTP) for hydraulic management as a function of governance mechanisms, development of a catchment management group , and interviews and workshops with riparian and other land-users. The work has highlighted the joys and sorrows of seeking to develop a PES approach and lessons to be learnt in project management, promotion of multiple benefits, catchment-scale water governance and the vices and virtues of “benign neglect”.


Author(s):  
Veronica Strang

All living kinds, human and nonhuman, require rights to water. A UN Declaration upholds rights to clean drinking water and basic sanitation for humans, and some environmental legislation seeks to assure minimal flows of water in ecosystems. However, such rights are situated within complex social and political relations that are often far from equal. The distribution and management of water is entangled in issues such as ethnicity, class, gender, and levels of enfranchisement, and is heavily dependent upon how beliefs and values about water are represented in dominant narratives. Although water has been regarded a “common good” for millennia, many forms of collective ownership of freshwater have been overridden by colonial appropriations and by attempts to enclose and privatize water resources and to reframe them as commercial assets. An accelerating global water crisis caused by climate change, intensifying farming, and the over-allocation of water resources reveals unsustainable pressures on freshwater ecosystems. There have been concomitant losses of access to water for less powerful human communities, and most particularly for nonhuman beings. As a result, approximately two hundred species become extinct every day. Widespread environmental degradation has caused indigenous communities to critique the exploitative practices of colonial societies and to promote alternate and more egalitarian visions of human-nonhuman relationships. Inspired by these alternate cultural beliefs and values, and sometimes in alliance with indigenous people, conservation organizations and environmental activists have sought ecological justice to protect nonhuman beings and their habitats. Many are demanding that the UN should declare “rights for nature” and that the International Court of Criminal Justice should define “ecocide” as an international crime. Anthropologists have challenged dominant dualisms about culture and nature, providing accounts of diverse cultural worldviews in which all living kinds inhabit a nonbifurcated world. They have underlined the fluid interelationalities between human and nonhuman beings and the material environment. Building on a strong disciplinary history of advocating for human rights, they are exploring ways to articulate nonhuman needs and interests, for example, in new forms of river catchment management. There is growing consensus about the need to encourage forms of “pan-species democracy” that will ensure that all living kinds have sufficient rights to water and to the conditions that enable them to flourish.


2021 ◽  
Vol 880 (1) ◽  
pp. 012024
Author(s):  
A Z Abdul Razad ◽  
S H Shamsuddini ◽  
A Setu ◽  
L Mohd Sidek

Abstract Climate change causes more frequent and intense rainfall events, leading to severe erosion in the catchment and sediment transferred into rivers and reservoirs. This study focus on long term sediment load in major rivers in Cameron Highlands and prediction of annual sediment inflow into Ringlet Reservoir from 2000 to 2030. Soil Water Assessment Tool (SWAT) is used as the simulation tool, utilising future gridded rainfall 2017 to 2030 under CCSM and future land use 2030. Future annual rainfall is minimum at 1551 mm (in 2030) and maximum at 3150 mm (in 2029). The future projected annual sediment load into Ringlet Reservoir from 2017 to 2030 is averaged at 354,013 m3/year, ranging from 216,981 to 461,886 m3/year. Comparing between the historical period of 2000 to 2016 and future projection (2017–2030), annual sediment load shows an increase of 12 %. To combat the increase sediment yield, catchment management such as erosion control plan, drainage and runoff control must be developed to minimise sediment yield and subsequent effect of high sediment load transport via rivers and drainage network.


Land ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 1024
Author(s):  
Clinton Carbutt ◽  
Dave I. Thompson

Southern Africa is an exceptionally diverse region with an ancient geologic and climatic history. Its mountains are located in the Southern Hemisphere mid-latitudes at a tropical–temperate interface, offering a rare opportunity to contextualise and frame our research from an austral perspective to balance the global narrative around sustainable mountain futures for people and biodiversity. Limited Long-Term Ecological Research (LTER) was initiated more than a century ago in South Africa to optimise catchment management through sound water policy. The South African Environmental Observation Network (SAEON) has resurrected many government LTER programmes and added observatories representative of the country’s heterogeneous zonobiomes, including its mountain regions. LTER in other Southern African mountains is largely absent. The current rollout of the Expanded Freshwater and Terrestrial Environmental Observation Network (EFTEON) and the Southern African chapters of international programmes such as the Global Observation Research Initiative in Alpine Environments (GLORIA), RangeX, and the Global Soil Biodiversity Observation Network (Soil BON), as well as the expansion of the Mountain Invasion Research Network (MIREN), is ushering in a renaissance period of global change research in the region, which takes greater cognisance of its social context. This diversity of initiatives will generate a more robust knowledge base from which to draw conclusions about how to better safeguard the well-being of people and biodiversity in the region and help balance livelihoods and environmental sustainability in our complex, third-world socio-ecological mountain systems.


Hydrology ◽  
2021 ◽  
Vol 8 (4) ◽  
pp. 145
Author(s):  
Charles Onyutha ◽  
Resty Nyesigire ◽  
Anne Nakagiri

This study employed Soil and Water Assessment Tool (SWAT) to analyze the impacts of climate variability and human activities on River Rwizi flows. Changes in land use and land cover (LULC) types from 1997 to 2019 were characterized using remotely sensed images retrieved from Landsat ETM/TM satellites. SWAT was calibrated and validated over the periods 2002–2008 and 2009–2013, respectively. Correlation between rainfall and river flow was analyzed. By keeping the optimal values of model parameters fixed while varying the LULC maps, differences in the modeled flows were taken to reflect the impacts of LULC changes on rainfall–runoff generation. Impacts due to human activities included contributions from changes in LULC types and the rates of water abstracted from the river as a percentage of the observed flow. Climate variability was considered in terms of changes in climatic variables such as rainfall and evapotranspiration, among others. Variability of rainfall was analyzed with respect to changes in large-scale ocean-atmosphere conditions. From 2000 to 2014, the portion of River Rwizi catchment area covered by cropland increased from 23.0% to 51.6%, grassland reduced from 63.3% to 37.8%, and wetland decreased from 8.1% to 4.7%. Nash–Sutcliffe Efficiency values for calibration and validation were 0.60 and 0.71, respectively. Contributions of human activities to monthly river flow changes varied from 2.3% to 23.5%. Impacts of human activities on the river flow were on average found to be larger during the dry (14.7%) than wet (5.8%) season. Using rainfall, 20.9% of the total river flow variance was explained. However, climate variability contributed 73% of the river flow changes. Rainfall was positively and negatively correlated with Indian Ocean Dipole (IOD) and Niño 3, respectively. The largest percentages of the total rainfall variance explained by IOD and Niño 3 were 12.7% and 9.8%, respectively. The magnitude of the correlation between rainfall and IOD decreased with increasing lag in time. These findings are relevant for developing River Rwizi catchment management plans.


2021 ◽  
Vol 13 (18) ◽  
pp. 10421
Author(s):  
Haiyan Fang

In recent years, to combat soil erosion, large-scale soil conservation measures have been implemented in the world. Evaluation of the integrated catchment management is urgently required. In the present study, soil erosion and sediment yield under 24 scenarios were predicted, based on the water and tillage erosion model and sediment delivery deposition model (WaTEM/SEDEM). The current catchment management was not ideal, with a catchment soil loss rate (SLR) of 599.88 t km−2 yr−1 and a sediment yield of 240.00 t km−2 yr−1. The catchment management with contour tillage on <3° slopes, hedgerow planting on 3–5° slopes, terracing on 5–8° slopes, and forestation on >8° slopes with trenches along the forest and dams in gullies was the best catchment management to control soil loss, with catchment SLR that was less than the tolerable value of 200 t km−2 yr−1. However, the SLR on the <3° slopes was still higher than the tolerable value. It is not enough to control soil loss by only implementing contour tillage measure on <3° slopes, and other measures should be further implemented on these slopes. In gullies, more measures should be implemented to prevent sediment flowing out of the catchments, in Northeastern China.


2021 ◽  
Vol 293 ◽  
pp. 112953
Author(s):  
Jianwei Dong ◽  
Hui Xie ◽  
Ranran Feng ◽  
Xijun Lai ◽  
Hongtao Duan ◽  
...  

Water ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2074
Author(s):  
Sarpong Hammond Antwi ◽  
Suzanne Linnane ◽  
David Getty ◽  
Alec Rolston

The River Basin Management Plan (RBMP) is an essential component of the European Union Water Framework Directive that details an integrated approach required to protect, improve and sustainably manage water resources. RBMP were intended to be produced for the periods 2009–2015, 2016–2021 and 2022–2027. However, after two years of delays in the development processes, the Republic of Ireland produced its first RBMP in 2010. The second RBMP cycle was also implemented in 2018 and is expected to run until the end of 2021 to give way to the third RBMP, whose consultation processes have been ongoing since December 2019. This paper contributes to the forthcoming RBMP by assessing stakeholders’ perspectives on the second RBMP through a desk-based review and by conducting interviews with nine institutions (14 interviewees). The qualitatively analysed interviews reveal a broad spectrum of actors associated with water management and governance in the Republic of Ireland through a three-tier governance structure that has been delivered (with amendment) through the first two RBMPs. Organisations such as the An Fóram Uisce|The Water Forum, the Environmental Protection Agency, the Local Authority Waters, and the Agricultural Sustainability Support and Advisory Programme have responsibilities designated in the RBMPs to deliver improved water quality, integrated catchment management, community engagement and awareness-raising. Trust has also been building up among these organisations and other agencies in the water sector. Despite these responsibilities and progress made, the interviews identified communication lapses, ineffective collaboration and coordination among stakeholders and late implementation to be hampering the successful delivery of the second RBMP, in addition to significant pressures acting on water bodies from agricultural activities and urban wastewater treatment. Towards the third RBMP, the paper concludes that optimised water sector finance, enhanced and well-resourced communications, and improved stakeholder collaboration are needed to foster effective and efficient water services delivery and quality. More so, given the cross-cutting impact of the Sustainable Development Goals on water resources and the interconnected relations among the goals, the paper further recommends the integration of the SDGs in the various plans of actions and a co-benefits approach to derive the triple benefits from biodiversity, climate change initiatives and water quality measures.


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