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Levelling the lake : transboundary resource management in the Lake of the Woods watershed
\"Levelling the Lake explores a century and a half of social, economic, and legal arrangements through which the resources environment of the Lake of the Woods and Rainy Lake watershed have been both harnessed and harmed. Stretching across parts of Ontario, Manitoba, and Minnesota, the Lake of the Woods and Rainy Lake basin spans boundaries and jurisdictions. Jamie Benidickson traces the environmental consequences of logging, mining, forest industries, commercial fishing, hydro-electricity production, and recreation on the natural environment and the often unanticipated impacts of these activities on water flows and quality as well as on local residents, including Indigenous communities, which encouraged new legal and institutional responses. Assessing the transition from primary resource extraction toward sustainable development at a watershed level with a focus on law and governance, Levelling the Lake also shows how inter-jurisdictional and transboundary issues--many involving the Canada-US International Joint Commission--continue to play a significant role in many parts of the region. Levelling the Lake features historical examples offering hard lessons and successful experiments that provide encouragement for the effective management of ecosystems such as the Lake of the Woods and Rainy Lake basin.\"-- Provided by publisher.
Book
A Holistic Review of Lake Rawapening Management Practices, Indonesia: Pillar-Based and Object-Based Management
Lake Rawapening, Semarang Regency, Indonesia, has incorporated a holistic plan in its management practices. However, despite successful target achievements, some limitations remain, and a review of its management plan is needed. This paper identifies and analyzes existing lake management strategies as a standard specifically in Lake Rawapening by exploring various literature, both legal frameworks and scholarly articles indexed in the Scopus database and Google Scholar about lake management in many countries. By using Publish or Perish with the keywords “lake management” OR “management of lake”, 1532 and 1990 works from the Scopus database and Google Scholar, respectively, have been reduced 37. The results show that there are two major types of lake management, namely pillar-based and object-based. The holistic review has resulted in nine points of pillar-based management, which consists of conceptual paradigms as the foundation, and 11 points of object-based management to restore or preserve the lake, which is in line with the form of programs and activities. Overall, Lake Rawapening management should be concerned with finance and technology when applying pillar-based management, and it should include more activities within programs on erosion-sedimentation control as well as monitoring of operational performance using information systems to ensure the implementation of activities within programs in applying object-based lake management.
Journal Article
Georgian Bay : discovering a unique North American ecosystem
\"A project of the Georgian Bay Land Trust, this book focuses on the preservation of the unique features of the Georgian Bay ecosystem.\"-- Provided by publisher.
Book
A web-based numerical model for sustainable management of Lake Batur, Bali: Preliminary results
Lake Batur is one of The National Priority Lakes according to President Regulation Number 60/2021 with the target of restoring water quality through the pollution control program for floating net fishery (FNF), agriculture, and other anthropogenic sources around the watershed. The regulation also states several internal measures designed to restore the lake’s water quality. Unfortunately, detailed information on pollution control priorities, the amount that must be controlled for water quality improvements to be visible, and the effectiveness of internal restoration efforts have yet to be obtained. This can hinder the lake restoration process and, furthermore, its sustainable management. This study aimed to develop a web-based numerical model as an open-source web-service for guiding restoration in Lake Batur. It is accessible via the interactive graphical user interface (GUI) running in a standard web browser and includes tools of varying complexity. The platform provides the user with features to set up some parameters, run and analyze the numerical water quality, and the possibility to set up, run and compare various lake management scenarios. The preliminary results show that the model was able to represent existing daily water quality dynamics. Hopefully, the model can be used as a tool for lake restoration and as a part of sustainable lake management.
Journal Article
Nature-based management scenarios for the Khojasan Lake
What is an effective approach to address wastewater treatment within low- and middle-income countries (LMICs)? To answer this question, we developed an integrated lake management (ILM) model which proves to reduce the pollution levels in our study site, Lake Khojasan basin, located in LMIC Azerbaijan. We found that the inflow of the treated wastewater into the lake can be a reliable approach to effectively restore the lake’s ecosystem. Our model suggests that treated wastewater may gradually replace polluted water from the lake and support its full rehabilitation while at the same time restoring neighboring water systems. Our ILM is based on our calculated water and pollutant balance equations. According to our model, the increased investment around the lake will lead to an improvement of the treated water. From the results of this work, future studies may expand upon our cost-effective integrated lake management (ILM) model when using natural inflow patterns into wetlands to purify the water basin. Our study provides a model for researchers to use or expand upon when implementing sustainable and eco-friendly methods that can control highly polluted and mismanaged lakes within LMICs.
Journal Article
Nitrogen and phosphorus trends in lake sediments of China may diverge
The brief history of monitoring nutrient levels in Chinese lake waters limits our understanding of the causes and the long-term trends of their eutrophication and constrains effective lake management. We therefore synthesize nutrient data from lakes in China to reveal the historical changes and project their future trends to 2100 using models. Here we show that the average concentrations of nitrogen and phosphorus in lake sediments have increased by 267% and 202%, respectively since 1850. In the model projections, 2030–2100, the nitrogen concentrations in the studied lakes in China may decrease, for example, by 87% in the southern districts and by 19% in the northern districts. However, the phosphorus concentrations will continue to increase by an average of 25% in the Eastern Plain, Yunnan–Guizhou Plateau, and Xinjiang. Based on this differentiation, we suggest that nitrogen and phosphorus management in Chinese lakes should be carried out at the district level to help develop rational and sustainable environmental management strategies.
Nutrient levels in Chinese lakes have rapidly increased since 1950 but future trends in lacustrine nitrogen and phosphorus across China will differentiate, according to projections up to 2100.
Journal Article
Imbalance of global nutrient cycles exacerbated by the greater retention of phosphorus over nitrogen in lakes
Imbalanced anthropogenic inputs of nitrogen (N) and phosphorus (P) have significantly increased the ratio between N and P globally, degrading ecosystem productivity and environmental quality. Lakes represent a large global nutrient sink, modifying the flow of N and P in the environment. It remains unknown, however, the relative retention of these two nutrients in global lakes and their role in the imbalance of the nutrient cycles. Here we compare the ratio between P and N in inflows and outflows of more than 5,000 lakes globally using a combination of nutrient budget model and generalized linear model. We show that over 80% of global lakes positively retain both N and P, and almost 90% of the lakes show preferential retention of P. The greater retention of P over N leads to a strong elevation in the ratios between N and P in the lake outflow, exacerbating the imbalance of N and P cycles unexpectedly and potentially leading to biodiversity losses within lakes and algal blooms in downstream N-limited coastal zones. The management of N or P in controlling lake eutrophication has long been debated. Our results suggest that eutrophication management that prioritizes the reduction of P in lakes—which causes a further decrease in P in outflows—may unintentionally aggravate N/P imbalances in global ecosystems. Our results also highlight the importance of nutrient retention stoichiometry in global lake management to benefit watershed and regional biogeochemical cycles.
Lakes preferentially retain phosphorous over nitrogen, amplifying the imbalance of nutrient cycles caused by anthropogenic inputs, according to analyses of more than 5,000 lakes globally.
Journal Article
Development and application of a sustainability index for a lake ecosystem
We modify an existing water quality index of Lake Kinneret to better match the objective of sustaining the ecosystem over time. The Kinneret Sustainability Index (KSI) provides a quantitative indication of how similar the current ecosystem is in relation to a reference state that managers are striving to achieve and sustain once accomplished. As Lake Kinneret is the only freshwater lake in Israel, it is vital to sustain the lake ecosystem over time. The KSI provides lake managers with a means for assessing the state of the lake. The KSI is based on nine ecosystem variables and provides information on each variable and the combined index. We present examples of application of the KSI to lake management and conduct a sensitivity analysis of the underlying assumptions demonstrating its robustness to the assumptions. While the index presented here is specific to Lake Kinneret, it is a general approach that can be readily applied to lakes worldwide and can assist, for example, in achievement of the required
good status
for European lakes.
Journal Article
Conflict and Peacebuilding in the African Great Lakes Region
Driven by genocide, civil war, political instabilities, ethnic and pastoral hostilities, the African Great Lakes Region, primarily Uganda, Rwanda, Democratic Republic of the Congo, and Burundi, has been overwhelmingly defined by conflict. Kenneth Omeje, Tricia Redeker Hepner, and an international group of scholars, many from the Great Lakes region, focus on the interlocking conflicts and efforts toward peace in this multidisciplinary volume. These essays present a range of debates and perspectives on the history and politics of conflict, highlighting the complex internal and external sources of both persistent tension and creative peacebuilding. Taken together, the essays illustrate that no single perspective or approach can adequately capture the dynamics of conflict or offer successful strategies for sustainable peace in the region.
eBook
Hypolimnetic withdrawal as a lake restoration technique: determination of feasibility and continued benefits
The withdrawal of hypolimnetic water enriched with nutrients and reduced substances has been used as a lake restoration technique (hypolimnetic withdrawal, HW) for more than 60 years. By reducing internal phosphorus loading, HW treats the cause of much of the water-quality deterioration in eutrophic stratified lakes, including cyanobacteria blooms. To support future applications, a feasibility study is presented that determines the applicability of HW to a drinking water source lake for the City of Stockholm as an example. Necessary treatment of the HW water includes a technically advanced facility. The possible application of passive siphoning by gravity limits recurring energy costs. The most efficient performance is ensured by the monitoring of HW operational variables and water quality in the source and receiving water. A review of the scientific literature and the worldwide web confirms that new and continued HW applications improve water quality in stratified lakes with anoxic hypolimnia. A previously developed model for the prediction of epilimnetic TP decreases from the long-term TP export via HW was supported by results from several new applications. Benefits of flow regulation considering climate change variability have been reported, suggesting that HW could play a progressively important role in lake management.
Journal Article