Floods and livelihoods: The impact of changing water resources on wetland agro-ecological production systems in the Tana River Delta, Kenya

Léauthaud, Crystèle; Duvail, Stéphanie; Hamerlynck, Olivier; Paul, Jean-Luc; Cochet, Hubert; Nyunja, J.; Albergel, Jean; Grünberger, Olivier

doi:10.1016/j.gloenvcha.2012.09.003

Cited by 58 publications

(24 citation statements)

References 37 publications

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“…Yu et al [34] showed that drought events has become ever more serious both in severity and in extent during the crop-growing season in recent decades over Northeast China. Moreover, wetlands have great sensitivity and vulnerability to the changes in water resources [26,35,36]. The warm-drying trend has contributed to considerable wetland degradation and agricultural hazards in Northeast China [37].…”

Section: Discussionmentioning

confidence: 99%

Nonlinear Response of Streamflow to Climate Change in High-Latitude Regions: A Case Study in Headwaters of Nenjiang River Basin in China’s Far Northeast

Zhang

Shen

et al. 2018

Water

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Assessment of the response of streamflow to future climate change in headwater areas is of a particular importance for sustainable water resources management in a large river basin. In this study, we investigated multiscale variation in hydroclimatic variables including streamflow, temperature, precipitation, and evapotranspiration in the Headwater Areas of the Nenjiang River Basin (HANR) in China's far northeast, which are sensitive to climate change. We analyzed 50-year-long records of the hydroclimatic variables using the ensemble empirical mode decomposition (EEMD) method to identify their inherent changing patterns and trends at the inter-annual and inter-decadal scales. We found that all these hydroclimatic variables showed a clear nonlinear process. At the inter-annual and inter-decadal scales, streamflow had a similar periodic changing pattern and transition years to that of precipitation; however, within a period, streamflow showed a close association with temperature and evapotranspiration. The findings indicate that the response of streamflow in headwater regions to climate change is a nonlinear dynamic process dictated by precipitation at the decadal scale and modified by temperature and evapotranspiration within a decade.

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Section: Discussionmentioning

confidence: 99%

Nonlinear Response of Streamflow to Climate Change in High-Latitude Regions: A Case Study in Headwaters of Nenjiang River Basin in China’s Far Northeast

Zhang

Shen

et al. 2018

Water

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“…The study was done in Tana River County (Figure 1) which covers 38,682 Km 2 in Kenya's coastal region. River Tana forms the Tana River Delta wetland that covers about 1,300 km 2 and supports more than 100,000 inhabitants (Leauthaud et al, 2013). The county is largely rangeland, receiving low and erratic convectional rainfall.…”

Section: Study Areamentioning

confidence: 99%

Determinants of Adoption Decisions of Water Harvesting Structures Among Pastoral Areas of Kenya

Lutta

Wasonga

Nyangito

et al. 2020

Preprint

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BackgroundThe arid and semi-arid lands are affected inherently by unpredictable rainfall and frequent droughts, which are exacerbated by climate change. This has resulted in deterioration of land resources, leading to forage and water shortages that negatively impact on livestock productivity. To cope with these climatic hazards that affect agricultural production and food security in pastoral areas, on farm adaptation strategies such as water harvesting initiatives are being supported by development agencies and governments. Some of these strategies have not been able to produce the desired levels of productivity and thus have failed to improve the welfare of the pastoral communities or prevent rangelands from deteriorating due to low adoption rates at household level.ResultsThis study determined social, economic and institutional factors influencing the adoption of water harvesting systems at household level in pastoral areas of Tana River County of Kenya. The data was collected through household survey, focus group discussions and key informant interviews. The results show that access to extension services and training, monthly income level, main source of livelihood, land tenure system, membership in community groups and availability of active farm labor significantly influenced the adoption of water harvesting structures which need a combination of technical efficiency with low cost and acceptability to pastoral communities.ConclusionPastoralists therefore need to be mobilized and trained on how to construct and use water harvesting structures and sensitized on the potential socioeconomic benefits of adopting them.

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“…In the Tana River delta in Kenya (Leauthaud et al . ), the Zambezi River in Mozambique (Davies et al . ) and the Kafue River in Zambia (Richter et al .…”

Section: Land Use Changementioning

confidence: 99%

Linking key environmental stressors with the delivery of provisioning ecosystem services in the freshwaters of southern Africa

Jackson

Woodford

Weyl

2016

Geography and Environment

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Societies' growing global footprint is causing a rapid increase in the demand for natural resources (i.e. ecosystem services), while also reducing the capacity of ecosystems to provide them. Freshwater ecosystems contribute disproportionately to ecosystem services but are also particularly vulnerable to global environmental change. The provisioning of freshwater services, such as water and food production, is especially important in developing countries. Here, we review the evidence which demonstrates the impacts of key environmental stressors on these two important provisioning services in southern Africa. Land use change, species invasions and climate change can all be linked to a loss of the provisioning services provided by freshwater ecosystems in southern Africa. Water resources for drinking, agriculture, sanitation and power are expected to decline as a result of both climate and land use change. Fish production may be negatively or positively affected by the different stressors, highlighting the high context‐dependency associated with their impacts. Evidence also suggests that these stressors can interact to alter one another's impacts or promote the proliferation of further stressors. For instance, land use change can promote aquatic plant invasions and, subsequently, the stressors may interact synergistically to cause fish kills. Stressors may also interact to mitigate one another's impact, for instance fish invasions may enhance total fish catch following a pollution event. Since stressors are unlikely to occur in isolation and multiple stressors frequently result in complex ‘ecological surprises’, it is urgent that we increase research effort on the links between multiple stressors and the loss of ecosystem services. Future research should, therefore, focus on the combined impacts of multiple environmental, social, and economic stressors on natural resources and provisioning ecosystem services in southern Africa.

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Floods and livelihoods: The impact of changing water resources on wetland agro-ecological production systems in the Tana River Delta, Kenya

Cited by 58 publications

References 37 publications

Nonlinear Response of Streamflow to Climate Change in High-Latitude Regions: A Case Study in Headwaters of Nenjiang River Basin in China’s Far Northeast

Nonlinear Response of Streamflow to Climate Change in High-Latitude Regions: A Case Study in Headwaters of Nenjiang River Basin in China’s Far Northeast

Determinants of Adoption Decisions of Water Harvesting Structures Among Pastoral Areas of Kenya

Linking key environmental stressors with the delivery of provisioning ecosystem services in the freshwaters of southern Africa

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