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From the Congo and the Mekong to the Seine and the Mississippi, Earth's rivers carve through landscapes before coursing into the world's oceans through estuaries and deltas. Their inexorable flow carries sediment and more, acting as lifeblood for a variety of ecosystems and communities. More than any other surface feature of Earth, rivers, estuaries, and deltas are vitally important to our economic and social well-being, and our management of them often sits at the sharp edge of today's most pressing environmental challenges. The World Atlas of Rivers, Estuaries, and Deltas takes readers on an unforgettable tour of these dynamic bodies of water, explaining how they function at each stage of their flow. Combining maps and graphics with informative essays and beautiful photos, this invaluable reference book will give you a new appreciation for the power that rivers, estuaries, and deltas wield. Features a wealth of colour photos, maps, and infographics. Brings together invaluable perspectives from leading experts. Describes the rich biodiversity associated with the world's rivers, estuaries, and deltas. Explains how rivers, estuaries, and deltas work, from river networks to deltaic floodplains, and sheds light on the erosion, movement, and deposition of sediment. Describes the anatomy of rivers, estuaries, and deltas, from channel geometry and river planforms to estuarine shape and delta morphology. Examines the ecology and ecosystems of rivers, estuaries, and deltas and how humans interact with these environments. Additional topics include damming, climate change, water use, pollution, resource management, and planetary health, as well as future perspectives on these vital landscapes.

Abstract Aim This research evaluated the water quality of the Taquacetuba Compartment, Billings Reservoir (Brazil), through analyzes of water quality data. The Taquacetuba Compartment has multiple uses such as public water supply and professional fishing activity and is of fundamental importance for the population of São Paulo State. Methods Sampling were conducted at the Compartment entrance (P1), close to the collecting point for public water supply transposition (P2), and in the mouths of the main tributaries (P3 - P6) forming the Compartment. Samplings were concentrated in the wet and dry periods of 2017. The physical and chemical variables measured were temperature, dissolved oxygen, pH, electrical conductivity, turbidity, chlorophyll α, ammonia nitrogen, nitrite, nitrate, total nitrogen, orthophosphate and total phosphorus. Results The Taquacetuba Compartment exhibited impaired water quality evidenced by high electrical conductivity, chlorophyll α and total phosphorus, above the legislation limits, classifying the sampling point as super or hyper eutrophic condition. The P1 sampling point presented the greatest environmental stress with worse water quality during the rainy season, while the other points (P2 - P6) showed an improvement during rainfalls. The P5 and P6, located at the tributaries mouth of the Monos and Curucutu River respectively, presented the best environmental conditions, evidenced by tendency to higher oxygen levels and lower turbidity in the rainy period. Conclusions From the observed result, we recognized two principal sources responsible for the impairment of the water quality in the Taquacetuba Compartment: i) the contribution from the central body of Billing Reservoir, related to the greater negative influence of the water pumping from the Pinheiros River with great organic load, especially in the wet period, and ii) the contribution from the tributaries, being that the Monos and Curucutu tributaries, as they are in an indigenous reserve area have better water quality. This study recognize the importance of land use and soil occupation around the tributaries and contribute with original data to support management measures for improving water quality in the Taquacetuba Compartment. Resumo Objetivo Esta pesquisa avaliou a qualidade da água do Compartimento Taquacetuba, Reservatório Billings (Brasil), por meio da análise de dados da qualidade de água. O Compartimento tem múltiplos usos como abastecimento público de água e atividade de pesca profissional e é de fundamental importância para a população do Estado de São Paulo. Métodos A amostragem foi realizada na entrada do compartimento (P1), junto ao ponto de captação para transposição de água para abastecimento público (P2) e na foz dos principais tributários (P3 - P6) formadores do compartimento. As amostragens se concentraram nos períodos úmido e seco de 2017. As variáveis físicas e químicas analisadas foram: temperatura, oxigênio dissolvido, pH, condutividade elétrica, turbidez, clorofila α, nitrogênio amoniacal, nitrito, nitrato, nitrogênio total, ortofosfato e fósforo total. Resultados O Compartimento Taquacetuba mostrou comprometimento da qualidade da água evidenciado por elevados níveis de condutividade elétrica, clorofila α e fósforo total, acima dos limites da legislação, classificando os pontos de amostragem com super ou hiper condição de eutrofia. O ponto P1, mostrou o maior estresse ambiental, com piora da qualidade da água no período chuvoso, já os demais pontos (P2 - P6) apresentaram melhora na época chuvosa. Os pontos P5 e P6, localizados na foz dos tributários rio Monos e rio Curucutu respectivamente, mostraram as melhores condições ambientais, evidenciadas por tendência aos maiores níveis de oxigênio e menor turbidez no período chuvoso. Conclusões A partir do resultado observado, reconhecemos duas fontes principais responsáveis pelo comprometimento da qualidade da água no Compartimento Taquacetuba: i) a contribuição do corpo central do reservatório Billings, relacionada à grande influência negativa do bombeamento de água do Rio Pinheiros com grande carga orgânica, especialmente durante o período das chuvas, e ii) a contribuição da bacia dos tributários, sendo que os tributários Monos e Curucutu, por estarem em área de reserva indígena, apresentam melhor qualidade da água. Este estudo reconhece a importância do uso e ocupação do solo no entorno dos afluentes e contribui com dados originais para subsidiar medidas de gestão para melhoria da qualidade da água no Compartimento de Taquacetuba.

Indices of stormwater management effectiveness focus on the cumulative effect actions have on the hydrologic regimes and levels of erosion mitigation in the watershed. To understand the broader implications of stormwater management can have on water quality and ecosystem health, hydrologic regimes of urban streams are linked to metrics of functional disturbance through long-term monitoring of water chemistry and environmental conditions. High-frequency data from sensors placed in-stream and remote satellite data of solar irradiance were collected over a two-year study period in three streams near Cleveland, Ohio and Denver, Colorado. Daily rates of gross primary production (GPP) and ecosystem respiration (ER), and of gas exchange velocity were estimated through inverse Bayesian modeling of dissolved oxygen dynamics. Estimates of GPP and ER provide point-comparisons of stream ecosystem function before and after storm events, quantifying the resistance of production and respiration to hydrologic pulses. Results show ecosystem respiration to be more less responsive, or more resistant, to high flow than gross primary production, resulting in well-lit streams rarely or never experiences days of net-autotrophic function. Recovery intervals of GPP were often interrupted by frequent high-intensity storms, indicating cumulative degradation of ecosystem function over time.

12th International Symposium on TARDIGRADA. Proceedings Guest Editors Lorena Rebecchi (University of Modena and Reggio Emilia, Italy) Diane R. Nelson (East Tennessee State University, USA) Roberto Bertolani (University of Modena and Reggio Emilia, Italy) Paulo Fontoura (University of Porto, Portugal)