The environmental situation of the cities, especially the larger ones, presents serious problems arising from human's inability to meet the demands of the agglomerations as they are settled, generating environments with low conditions of habitability. The supremacy of economic interests on natural ecosystems has established a complex network of impacts in raising resources to build the cities, from the extraction of material to the issuance of its final waste.

The capitalist city summarizes, in the heterogeneity of its localities, the processes of social inequalities and issues like access to built environments, the economical situation of its population, as well as the effects of the ongoing public policies. The city of Sao Paulo, a metropolis of global characteristics, has developed serious social debts throughout its history. During the raining season, Sao Paulo city becomes the scenery of constant social and economical impacts towards the losses caused by flooding.

This study aims are to compare the characteristics of the Greek Polis of Metaponto and Poseidonia water collecting and distribution systems. And also, display the differences and similarities between the water management systems used, as to better understand the criteria developed to orientate the place of settlements and also of certain urban characteristics chosen by the Greeks, between the VIII and IV centuries B.C.

O sistema de irrigação, as práticas de manejo da água e manejos diferenciados de preparo do solo para o cultivo do arroz são fatores determinantes à produção deste cereal, influenciando de forma diferenciada o efluxo de gases de efeito estufa (GEE), sendo que alguns desses apresentam potencial mitigador das emissões de GEE.

The inability to monitor wetland drag coefficients at a regional scale is rooted in the difficulty to determine vegetation structure from remote sensing data. Based on the fact that the backscattering coefficient is sensitive to marsh vegetation structure, this paper presents a methodology to estimate the drag coefficient from a combination of SAR images, interaction models and ancillary data. We use as test case a severe fire event occurred in the Paraná River Delta (Argentina) at the beginning of 2008, when 10% of the herbaceous vegetation was burned up.

El artículo plantea la importancia de integrar el concepto de cuenca a la distribución de los recursos. Se propone integrar un trabajo detallado por cuenca que involucre el cálculo del caudal de agua, la variación de la napa freática, el caudal ecológico, los volúmenes de erosión y la distribución actual del agua, para de allí plantear la distribución del agua en la cuenca. El aprovechamiento y distribución de los recursos naturales se encuentran estrechamente vinculados a la distribución del agua.

En julio del 2010, la Organización de las Naciones Unidas, declaró el derecho humano al agua potable y el saneamiento, instando a los Estados y a la cooperación internacional a proporcionar los recursos financieros y propiciar la capacidad y transferencia tecnológica para que los países en desarrollo pudiesen acceder a este derecho.

Irrigation is the most effective way to increase agricultural production. However, if inadequately employed, it can cause significant negative impacts to the environment. In this setting, this study aims at contributing to improving community selfmanagement of water resources by introducing IRRIGAMETRO® and IRRIPLUS® as tools to assist in irrigation and propose guidelines to practical use of these tools.

Problems related to water resources have been the source of conflicts at different levels and between different actors. Consequently, new political-institutional schemes have been proposed, shifting towards governance, permitting the involvement of new actors in political decision-making processes. This article presents a case study on water management in the municipality of Union de Tvla in western Mexico, using the Analytical Governance Framework, which addresses five elements: problems, actors, nodal points, norms and processes.

Desde inicios del siglo XXI, la Gestión Integrada de los Recursos Hídricos (GIRH) se ha constituido en el modelo referente de manejo del agua a nivel mundial. Organismos multilaterales, como el Banco Mundial o el Banco Interamericano de Desarrollo, y organizaciones internacionales, como la Global Water Partnership, han impulsado reformas institucionales en diversos países con el fin de instaurar un modelo de gobernanza que cristalice los principios de la GIRH.

O objetivo deste trabalho foi quantificar o armazenamento, a disponibilidade e a extração de água no solo por plantas de milho irrigadas e submetidas a déficit hídrico terminal, cultivadas sob sistema de semeadura direta e preparo convencional. Foram realizados dois experimentos durante os anos agrícolas de 1999/00 e 2000/01, em área experimental do Departamento de Engenharia Rural da Universidade Federal de Santa Maria. Utilizou-se o delineamento experimental inteiramente casualizado, fatorial, com quatro repetições.

A drenagem urbana, antes conceituada no rápido escoamento das águas pluviais, tem-se apresentado insustentável no meio urbano. Desse modo, não se trata mais de trabalhar esse sistema isolado, mas sim, integrar todo o sistema das águas urbanas, realizando um manejo eficaz e adequado desde o início do evento de precipitação. A partir disso, algumas alternativas estão sendo desenvolvidas, a fim de compensar os impactos negativos que ocorrem nas áreas urbanas, como alagamentos e inundações.