Differentiated access: Challenges of equitable and sustainable groundwater exploitation in Tanzania

Groundwater is an important resource for a large share of the global population and economies. Although groundwater dependence in most sub-Saharan African countries is relatively low at the national level, localized overexploitation is occurring, leading to a decline in groundwater levels and quality deterioration. Currently, the sustainable and equitable governance of groundwater, both through promotion and regulation, is turning out to be a key challenge in many sub-Saharan African countries. This paper uses case studies of urban groundwater governance in Arusha, and rural groundwater development in the Pangani basin, to analyse how the current policy and regulation inadvertently creates spaces for asymmetric access to (good quality) groundwater resources in Tanzania. It shows how the groundwater landscape is evolving into a situation where small users (farmers and households) rely on springs and shallow wells, while large users (commercial users and urban water authorities) are encouraged to sink deep boreholes. Amidst a lack of knowledge and enforcing capacity, exacerbated by different priorities among government actors, the water access rights of shallow well and spring users are being threatened by increased groundwater exploitation. Hence, the current groundwater policy and institutional setup do not only empower larger actors to gain disproportionate access to the groundwater resources, but presents this as a benefit for small users whose water security will supposedly increase

Why prepaid technologies are not a panacea for inclusive and sustainable rural water services in Tanzania?

This research article published by IWA publishing, 2020Poor sustainability of rural water schemes is a major problem in service delivery in sub-Saharan Africa. About half of the schemes fail one year after commissioning, mostly due to poor operation and maintenance. Many communities fail to collect and manage water revenue. Prepaid technologies are argued to remedy the poor water revenue management. However, it is not clear to what extent prepaid systems can contribute to the sustainability of rural water schemes. This paper assessed the performance of three different cases where prepaid technologies were used in Tanzania. Although the technologies used can simplify water revenue collection, they are not a panacea to deliver sustainable and equitable water services. The capital cost of the prepaid system is often paid for by donors, which is not being recovered, hence the notion of cost recovery is biased here. Also, a strong institutional capacity and knowledge is required alongside the technology. Therefore, the technology which is being promoted as better for improving cost recovery is, instead, causing a burden on water users

The role of statutory and local rules in allocating water between large- and small-scale irrigators in an African river catchment

Abstract This paper presents a case study of large-and small-scale irrigators negotiating for access to water from Nduruma River in the Pangani River Basin, Tanzania. The paper shows that despite the existence of a formal statutory water permit system, all users need to conform to the existing local rules in order to secure access to water. The spatial geography of Nduruma is such that smallholder farmers are located upstream and downstream, while large-scale irrigators are in the midstream part of the sub-catchment. There is not enough water in the river to satisfy all demands. The majority of the smallholder farmers currently access water under local arrangements, but large-scale irrigators have obtained state-issued water use permits. To access water the estates adopt a variety of strategies: they try to claim water access by adhering to state water law; they engage with the downstream smallholder farmers and negotiate rotational allocation; and/or they band with downstream farmers to secure more water from upstream farmers. Estates that were successful in securing their water access were those that engaged with the local system and negotiated a fair rotational water-sharing arrangement. By adopting this strategy, the estates not only avoid conflict with the poor downstream farmers but also gain social reputation, increasing chances of cooperative behaviours from the farmers towards their hydraulic infrastructure investments. Cooperative behaviours by the estates may also be due to their dependence on local labour. We further find diverging perspectives on the implementation of the state water use permits -not only between the local and state forms of water governance, but also between the differing administrative levels of government. The local governments are more likely to spend their limited resources on 'keeping the peace' rather than on enforcing the water law. At the larger catchment scale, however, the anonymity between users makes it more difficult to initiate and maintain cooperative arrangements

Potential of anaerobic co-digestion in improving the environmental quality of agro-textile wastewater sludge

This research article published by IWA publishingSludge from textile effluent treatment plants (ETP) remains a challenge for many industries due to inefficient and limited waste management strategies. This study explores the potential of using anaerobic digestion (AD) to improve the environmental quality of textile ETP sludge. The AD of ETP sludge is affected by the low C/N ratio (3.7), heavy metal content, and toxicity. To improve the process, co-digestion of ETP sludge with different substrates (sewage sludge, cow dung, and sawdust) under mesophilic conditions (37 °C), followed by a thermochemical pretreatment was assessed. The results showed that anaerobic co-digestion of the textile sludge with the co-substrates is effective in reducing pollution load. It was found that organic matters degraded during the 30-day AD process. The chemical oxygen demand and biological oxygen demand reduction was in the range of 33.1–88.5% and 48.1–67.1%, respectively. Also, heavy metal (cadmium, lead, iron, and, mercury) concentration was slightly reduced after digestion. Maximal biogas yield was achieved from co-digestion of textile sludge and sewage sludge at a mixing ratio of 3:1, 1:1, and 1:3, and methane content was respectively 87.9%, 68.9%, and 69.5% of the gas composition. The results from this study show that co-digestion will not only reduce the environmental pollution and health risks from the textile industry but also recover useful energy

Farmer's appropriation of system of rice intensification practices in water-scarce irrigation schemes in Northern Tanzania

This research article published by Springer Nature Switzerland AG.,2021The system of rice intensification (SRI), advocates new ways of rice cultivation which challenges farmers’ knowledge and skills to the extent that they are required to learn, experiment and integrate new principles to suit their specific needs and agro-ecological conditions. This study was conducted to evaluate farmers’ appropriation to SRI; first, a survey was conducted to explore farmers’ adjustments of SRI. Second, yield and water productivity of the integrated system were assessed by setting up an experiment in the farmers’ plots. Whereby four treatments representing farmers’ adaptations of SRI practises were assessed: continuous flooding (F1) with two 21 days old seedlings at 15 × 15 cm spacing. The other three were under intermittent irrigation with two 21 days seedlings at 20 × 20 cm (F2), one 21 days seedling at 20 × 20 (F3) and one 15 days seedling at 25 × 25 cm spacing. Yields obtained were 4.8, 8.5, 8.2 and 9.2 tons/ha for F1, F2, F3 and F4, respectively. Water productivity (WP) of 0.15, 0.39, 0.35 and 0.51 kg/m3 was obtained for F1, F2, F3 and F4, respectively. Water saving under SRI practise was 34.3%, 28.9% and 45.1% for F2, F3 and F4, respectively. Two seedlings 21 days old at 20 × 20 cm with intermittent irrigation are recommended for this area as it ensures a sufficient number of plants, relatively higher yields and a reduced considerable amount of irrigation water. The findings show that the integration of SRI into the local rice farming system has the potential to improve yields and water productivity of irrigation schemes

The potential of anthill soils in agriculture production in Africa: A review

This research article published by the International Journal of Biosciences, 2017In this review, we have attempted to highlight the critical role which anthills could play in sustainable agriculture practices as a locally available resource for the benefit of financially and soil fertility challenged smallholder farmers. Examples from across sub-Saharan Africa region have been elucidated in this paper on how the anthills have been utilized as a choice of low external input farming strategy for soil fertility challenges. Data from the study was collected through literature search from past and present research work by various scientists across the globe encompassing the internet and research articles. We have become aware that anthill soils could play a crucial role as an alternative to chemical fertilizer for farmers who have no means of buying inorganics. We recommend that for effective utilization of anthills in crop production, there is need to build the capacity of extension staff and farmers on the application method using micro dosing techniques and simple estimation of quantity for determining the requirements per hectare. Raising awareness to policy makers at all levels could stimulate interest on how this resource could be integrated as one of the components of integrated soil fertility management in conservation agriculture technologies. Carrying out studies which would focus on factors that could help in fast development of anthills would be key for enhancing crop development amongst the smallholder farmers challenged by cost of fertilizer input

Levels of community participation and satisfaction with decentralized wildlife management in Idodi-Pawaga Wildlife Management Area, Tanzania

This research article published by Taylor & Francis Online, 2017Participatory approaches to conservation are viewed as a plausible alternative to the old ‘fortress conservation’ approach. The design and implementation of these approaches in developing countries have tended to embrace community participation through decentralized governance mechanisms in the past three decades. However, sustainable conservation approaches that maintain community livelihoods while conserving biodiversity are challenged with meeting both objectives. In addressing this challenge, little attention has been given to an empirical analysis of community’s satisfaction levels on how they participated in the design and implementation of this approach. In this article, we use a mixed method approach using both quantitative and qualitative data to examine levels of satisfaction and participation of local communities in the Idodi-Pawaga Wildlife Management Area (WMA), south-western Tanzania. We find that social economic factors (e.g. age, household size, gender, number of years living in the same location and participation/non-participation) influence, in different ways, the satisfaction levels of community’s participation towards the WMA creation. Due to inadequate participation, we find that the WMA design and implementation process failed from the beginning to actively involve the local communities and this has resulted in the near absence of the promised economic benefits from wildlife conservation. We suggest that participation should go beyond the simple information sharing to actively engage the local communities in key planning activities from the beginning of any WMA programme. It is also important to take into consideration their levels of satisfaction with the process of decision-making if meaningful decentralized governance is to be achieved

Decentralized Environmental Governance: A reflection on its role in shaping Wildlife Management Areas in Tanzania

This research article published by Tropical Conservation Science, Vol.8 (4), 2015Decentralised environmental governance has become a catchy solution to environmental problems caused by the failure of traditional centralised environmental governance. It promises to transfer power and authority, improve efficiency, equity, accountability, and inclusion of local people who were previously excluded by the command and control model. This paper examines the efficacy of decentralised environmental governance as an alternative approach to wildlife conservation in Tanzania. We analyse the policy and legal framework for Wildlife Management Areas (WMAs) in Tanzania over the past two decades as a case study on current practice and its implications. We find that despite the rhetoric of community-based conservation (CBC), the wildlife industry remains heavily under state control, while the promises of CBC remain elusive. Questioning the effectiveness of decentralised environmental governance through CBC, we recommend that actors return to the drawing board and re-negotiate their positions, interests, power and authority if meaningfully decentralised environmental governance is to be achieved

Physicochemical and Microbiological Variations in Rivers on the Foothills of Mount Meru, Tanzania.

This research article published by the International Journal of Scientific & Engineering Research Volume 8, Issue 9, September-2017Little is known on the physicochemical and microbiological changes in Nduruma, Tengeru and Maji ya Chai Rivers. Such important variations were studied during wet and dry seasons in 2015. Water samples from various predetermined points of the rivers were analyzed for major physicochemical and microbial contents using APHA standard methods. Pollution levels in Tengeru River were lower than those of Nduruma and Maji ya Chai Rivers. The fecal coliforms were found in all water samples whereas other parameters were found to be within the WHO maximum permissible limits in most samples. Few samples had BOD, nitrates and total soluble phosphates levels higher than the WHO of 10 mg/l, 50 mg/l and 0.1 mg/l, respectively. Most areas in wet season recorded COD levels higher than the WHO recommended values of 10 mg/l. Few areas in the dry season had EC of up to 1722 µS/cm which is above the WHO maximum recommended level of 500-1500 µS/cm. The stable isotopes studies in water samples revealed sources of DOC in Nduruma River was from plant materials and soil composite with its nitrates being mainly from urea fertilizers applied by farmers. Ground water was the main source of DOC in headwater of Tengeru while manure was its main source in the floodplain with its nitrates originating from animal manure.DOC in Maji ya Chai River originated from plant materials whereas the nitrates was from wild animal manure. The observed severe degradations of the riparian environment of the rivers call upon immediate rehabilitation measure