The planetary boundaries framework defines a safe operating space for humanity based on the intrinsic biophysical processes that regulate the stability of the Earth system. Here, we revise and update the planetary boundary framework, with a focus on the underpinning biophysical science, based on targeted input from expert research communities and on more general scientific advances over the past 5 years. Several of the boundaries now have a two-tier approach, reflecting the importance of cross-scale interactions and the regional-level heterogeneity of the processes that underpin the boundaries. Two core boundaries—climate change and biosphere integrity—have been identified, each of which has the potential on its own to drive the Earth system into a new state should they be substantially and persistently transgressed.

/pdf/planetary-boundaries-guiding-human-development-on-a-changing-5gmf909etg.pdf

Planetary boundaries: Guiding human development on a changing planet

Cause, conseguenze e strategie di mitigazione Proponiamo il primo di una serie di articoli in cui affronteremo l’attuale problema dei mutamenti climatici. Presentiamo il documento redatto, votato e pubblicato dall’Ipcc - Comitato intergovernativo sui cambiamenti climatici - che illustra la sintesi delle ricerche svolte su questo tema rilevante.

/pdf/climate-change-2007-the-physical-science-basis-1x93ttz9jt.pdf

Climate Change 2007: The Physical Science Basis.

The Intergovernmental Panel on Climate Change (IPCC) Technical Paper Climate Change and Water draws together and evaluates the information in IPCC Assessment and Special Reports concerning the impacts of climate change on hydrological processes and regimes, and on freshwater resources – their availability, quality, use and management. It takes into account current and projected regional key vulnerabilities, prospects for adaptation, and the relationships between climate change mitigation and water. Its objectives are:

/pdf/climate-change-and-water-2dpc0zbpsj.pdf

Climate change and water.

An Introduction to MultiAgent Systems.

Climate change 2014 - Synthesis Report

/pdf/energy-sector-for-the-integrated-system-dynamics-model-for-32ln2jy24r.pdf

Energy Sector for the Integrated System Dynamics Model for Analyzing Behaviour of the Social-Economic-Climatic Model

Systems approach to management of disasters : , Systems approach to management of disasters : , کتابخانه دیجیتال جندی شاپور اهواز

Systems approach to management of disasters

Water is an important factor in conflicts among stakeholders at the local, regional, and international level. Water conflicts have taken many forms, but they almost always arise from the fact that the freshwater resources of the world are not partitioned to match the political borders, nor are they evenly distributed in space and time. Sharing a limited water resource by several stakeholders can create conflicts among them when their requirements exceed availability. In such situations, water allocation based on a traditional optimization or simulation modeling may not resolve the dispute among them due to the lack of their participation in the solution process. Direct involvement of the stakeholders in the conflict resolution process provides for a better understanding of the conflict and offers a significant opportunity for its resolution. A systemic approach has been taken in this research to approach resolution of conflicts over water. By helping stakeholders to explore and resolve the underlying structural causes of conflict our approach offers a significant opportunity for its resolution. We define the five main functional activities for assisting the conflict resolution process as: (i) communication; (ii) problem formulation; (iii) data gathering and information generation; (iv) information sharing; and (v) evaluation of consequences. A computerized technical support is developed in the form of the Conflict Resolution Support System (CRSS) for implementation of a systemic approach to water conflicts. The CRSS includes computational modules necessary to resolve conflicts resulting from water shortages in irrigation, drinking water supply, and hydropower generation and flood control. Its principal components i nclude an artificial intelligence-based communication system, a database management system, and a model base management system. The use of CRSS is demonstrated through its application to three types of water sharing conflicts. The CRSS is developed as a tool to assist a conflict resolution process and a tool for training stakeholders in the conflict resolution process. ii Acknowledgements The UNESCO – IHP, has provided financial support for this project.

/pdf/conflict-resolution-support-system-a-software-for-the-55icrya5oo.pdf

Conflict Resolution Support System: A Software for the Resolution of Conflicts in Water Resource Management

[1] Optimal operation models for a hydropower system using new fuzzy multiobjective mathematical programming models are developed and evaluated in this study. The models use (i) mixed integer nonlinear programming (MINLP) with binary variables and (ii) integrate a new turbine unit commitment formulation along with water quality constraints used for evaluation of reservoir downstream impairment. Reardon method used in solution of genetic algorithm optimization problems forms the basis for development of a new fuzzy multiobjective hydropower system optimization model with creation of Reardon type fuzzy membership functions. The models are applied to a real-life hydropower reservoir system in Brazil. Genetic Algorithms (GAs) are used to (i) solve the optimization formulations to avoid computational intractability and combinatorial problems associated with binary variables in unit commitment, (ii) efficiently address Reardon method formulations, and (iii) deal with local optimal solutions obtained from the use of traditional gradient-based solvers. Decision maker's preferences are incorporated within fuzzy mathematical programming formulations to obtain compromise operating rules for a multiobjective reservoir operation problem dominated by conflicting goals of energy production, water quality and conservation releases. Results provide insight into compromise operation rules obtained using the new Reardon fuzzy multiobjective optimization framework and confirm its applicability to a variety of multiobjective water resources problems.

https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/wrcr.20224

Fuzzy multiobjective models for optimal operation of a hydropower system

/pdf/flood-frequency-analysis-using-copula-with-mixed-marginal-36nqcaxgdh.pdf

Slobodan P. Simonovic

Papers

Energy Sector for the Integrated System Dynamics Model for Analyzing Behaviour of the Social-Economic-Climatic Model

Systems approach to management of disasters

Conflict Resolution Support System: A Software for the Resolution of Conflicts in Water Resource Management

Fuzzy multiobjective models for optimal operation of a hydropower system

Flood Frequency Analysis Using Copula with Mixed Marginal Distributions