Download or read book A Spatial and Temporal Analysis of the Impact of Rainfall Events and Land Use on River Water Quality written by Samira Emadi and published by . This book was released on 2017 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract - if sent.

Download or read book Landscape Ecology in Theory and Practice written by Monica G. Turner and published by Springer Science & Business Media. This book was released on 2007-05-08 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: An ideal text for students taking a course in landscape ecology. The book has been written by very well-known practitioners and pioneers in the new field of ecological analysis. Landscape ecology has emerged during the past two decades as a new and exciting level of ecological study. Environmental problems such as global climate change, land use change, habitat fragmentation and loss of biodiversity have required ecologists to expand their traditional spatial and temporal scales and the widespread availability of remote imagery, geographic information systems, and desk top computing has permitted the development of spatially explicit analyses. In this new text book this new field of landscape ecology is given the first fully integrated treatment suitable for the student. Throughout, the theoretical developments, modeling approaches and results, and empirical data are merged together, so as not to introduce barriers to the synthesis of the various approaches that constitute an effective ecological synthesis. The book also emphasizes selected topic areas in which landscape ecology has made the most contributions to our understanding of ecological processes, as well as identifying areas where its contributions have been limited. Each chapter features questions for discussion as well as recommended reading.

Download or read book A Methodology for Assessing the Impact of Landuse Changes on Watershed Runoff written by Mustafa Yousif Mohamed and published by . This book was released on 2006 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: With rapid land development and limited water resources, good quality water becomes an important commodity that every economic sector is competing for. Landuse changes in a watershed can affect the watershed hydrology in various ways. Some types of land development can be associated with increased impervious area causing increasing in surface runoff and decrease in ground water recharge. Both of these processes can have large-scale ramifications through time. Increased runoff results in higher flows during rainfall events, which in turn increases the number of times that a river floods the adjacent land areas. Likewise, this increase in runoff and channel flows can drastically increase the erosion of river water channel beds and banks, potentially destabilizing bridges or local structures. On the other hand the groundwater recharge decreased due to increase in the impervious surfaces and decrease in the soil infiltration rate. This may leads to rescissio in the river base flow especially during the dry season. Since rainfed agriculture in Malaysia may not have reservoirs for irrigation water supply, it is very important to maintain high base flows so that enough water is available for irrigation during dry season. Understanding how the landuse change influencess the river basin hydrology may enable planners to formulated policies to minimize the undesirable effects of land development. The main objective of this study was to develop a methodology to assess the impacts of landuse changes on the watershed runoff. The need for spatial and temporal land-cover change detection over a large scale makes satellite imagery the most cost effective, efficient and reliable source of data. The applicability of GIS makes it an important and efficient tool for spatial hydrologic modeling. In this study Satellite images and GIS were intergrated with a developed spatial hydrological model to evaluate the impacts of land development in the Upper Bernam River Basin of Malaysia. The Bernam River is the main source or irrigation water for a roce granary area. A methodology to assess the hydrological impacts due to landuse modifications was developed using a physically based models are important in understanding hydrological processesm, there are many practical situations where the main concern is with making accurate predictions at specific locations. The well-established HEC-1 model was calibrated and used to simulate the runoff process. Runoff hydrographs were generated for wet and dry seasons using lumped and distributed modeling concepts. In the distributed modeling approach, hydrographs from each sub basin was routed to the outlet point using the Muskingum routing method. Artificial Neural Network (ANN) model was developed because it has the ability to extract the non-linear relation between the inputs and output of a process, without the physics being explicity provided to them, this makes the simulation process more applicable. The models were tested and validated using data collected from the study area. The models performances were checked using both graphical and statistical analysis. Mean absolute errors (MAE), mean square error (MSE), root mean square error (RMSE), Theil's coefficient, coefficient of determination (R2), coefficient of efficiency (E), T-test and regression analysis were used as evaluation criteria for model performance. The models show good performance in simulating the runoff process. Results from the hydrological model gave 0.79, 1.35, 0.22, 0.91 and 0.67 for MAE, MSE, U, R2 and E, respectively. The weigthed curve number (CN ) was found to have increased by 2% in a year 2001 compared to 1989, and had cuased an increased in peak flow by 7%. The effect of change in CN is more on the rising limb of the hydrograph and peak runoff than on the falling limb. As CN increases in the rising limb shifted backwards. For the ANN model, it was found that correlation coefficients between simulated and observed flow are 0.94 and 0.89 for the training and testing phases, respectively. The model outputs were within the confidence level of 95% and most of the scatter output values were within 15% deviation bands. The statistical evalution during the training phase gave the values of 0.001, 4.77, 0.06 and 0.87 for MAE, MSE , U and E, respectively, and these values were found to be 17.6, 5.6, 0.11 and 0.58 for the testing phase, respectively. For both models applications, it was found that the percentage change runoff due to landuse change is constant for different landuse, irrespective of the rainfall pattern and timeof occurence. The models were then applied to simulate the runoff from the future land development for the year 2020 and from different landuse scenarios. Predictions from the hydrological model show that an increase in weighted CN by 7% and 13% for wet and dry seasons, respectively, will cause an increase in flow volume by 53% and 62% and increase in peak flow by 80% and 76% for the wet and dry seasons, respectively. This methodology can be applied for any future development plans to predict the hydrological impacts to migitate the risk of floods occurence and avoid the shortage of irrigation water. The methodology can be used as a decision making tool when formulating landuse policies. It can be a practical tool for hydrologists, engineers and town and country planners. The irrigation engineers can use this tool during the planning for irrigation water supply and determination of future cultivable areas based on the availability of the irrigation water due to the land development.

Download or read book Satellite Rainfall Applications for Surface Hydrology written by Mekonnen Gebremichael and published by Springer Science & Business Media. This book was released on 2009-12-02 with total page 327 pages. Available in PDF, EPUB and Kindle. Book excerpt: With contributions from a panel of researchers from a wide range of fields, the chapters of this book focus on evaluating the potential, utility and application of high resolution satellite precipitation products in relation to surface hydrology.

Download or read book Land Use Effects on Streamflow and Water Quality in the Northeastern United States written by Avril L. de la Cretaz and published by CRC Press. This book was released on 2007-06-01 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: Filling a long-standing need for a desk reference that synthesizes current research, Land Use Effects on Streamflow and Water Quality in the Northeastern United States reviews and discusses the impact of forest management, agriculture, and urbanization. The book provides a gateway to the diverse scientific literature that is urgently needed

Download or read book Spatial and Temporal Trends and the Role of Land Use cover on Water Quality and Hydrology in the Fish River Watershed written by Andrew Grant Morrison and published by . This book was released on 2010 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the International Symposium on Remote Sensing of Environment written by and published by . This book was released on 2005 with total page 1084 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Impacts of Landscape Change on Water Resources written by Manoj K. Jha and published by MDPI. This book was released on 2020-11-13 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Changes in land use and land cover can have many drivers, including population growth, urbanization, agriculture, demand for food, evolution of socio-economic structure, policy regulations, and climate variability. The impacts of these changes on water resources range from changes in water availability (due to changes in losses of water to evapotranspiration and recharge) to degradation of water quality (increased erosion, salinity, chemical loadings, and pathogens). The impacts are manifested through complex hydro-bio-geo-climate characteristics, which underscore the need for integrated scientific approaches to understand the impacts of landscape change on water resources. Several techniques, such as field studies, long-term monitoring, remote sensing technologies, and advanced modeling studies, have contributed to better understanding the modes and mechanisms by which landscape changes impact water resources. Such research studies can help unlock the complex interconnected influences of landscape on water resources in terms of quantity and quality at multiple spatial and temporal scales. In this Special Issue, we published a set of eight peer-reviewed articles elaborating on some of the specific topics of landscape changes and associated impacts on water resources.

Download or read book River System Analysis and Management written by Nayan Sharma and published by Springer. This book was released on 2016-11-13 with total page 413 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main thrust of this book is focused on addressing the various interrelated processes, analysis and activities bearing upon sound river management. River basins are complex systems. They are open systems with sometimes ill-defined boundaries. It refers to various aspects essential to achieve a sustainable development of river basins, including water demand and river management. Intensified erosion, land water degradation and stream flow pollution which call for appropriate river restoration and training measures. A viable theory for river management must reconcile the various processes that occur at different scales in order to develop a knowledge base by synthesizing research and field studies results. The book is intended to augment the knowledge base of behaviour of rivers and analyse the issues related to rivers so as to develop river system management techniques emerging from in-depth scientific analysis as a priority. This book pools together the expertise, the in-depth knowledge and the experience of the people representing different disciplines bearing on the related aspects of analysis and management of river systems. Audience The book is expected to be useful to academics, practitioners, scientists, water managers, environmentalists, administrators, researchers and students who are involved and have stakes in water management and river system analysis.

Download or read book Impacts of Climate and Human Activities on Water Resources and Quality written by Weili Duan and published by Springer. This book was released on 2021-08-26 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the rapid increase of world population, the global water shortage is set to be the major crises of the twenty-first century; that is, population dynamics (growth, age distribution, urbanization and migration) create pressures on freshwater resources due to the increased water demands and pollution. Moreover, water resources management faces a new uncertainty- i.e. the potential for longer-term and more persistent climate change nowadays, which, in coming years, may significantly affect the availability of supply and patterns of water demand. This book mainly focuses on the impact of climate change and human activities on water quality and water resources in Asia Countries. It begins by describing the characteristics of water related disasters in the world. Then, the book analyzes the changes of floods and associated socio-economic damages for whole China over the last century, and assesses water quality and pollution source for the Yangtze River Basin, suggesting water-related disasters would become more intense, longer lasting, and/or more frequent in a future warmer climate. Then, after investigating spatiotemporal trends and causes of water quality and water quality incidents (Chapter 4) and precipitation extreme events (Chapter 5) in Japan, subsequent two chapters mainly evaluate the climate and human impacts on precipitation variations, water quality and water resources in the Hokkaido area. The final chapter comprehensively analyzes climate change impacts on water resources in the Aral Sea Basin, and then estimate the water requirements and water deficits for irrigation, future agricultural yields of seven major crops, and land and water productivity in four provinces of Turkmenistan considering climate change, population growth, and three socio-economic development scenarios. All results obtained from this book may provide a means to reduce water quality incidents and mitigate future negative impacts by adapting water management. Furthermore, the improved methods for water quality modeling in data scarce regions are transferable to other study areas and applicable in future research.

Download or read book Extreme Precipitation Events Spatio Temporal Connections Forecasting Generation Impact Analysis Vulnerability and Risk Assessment written by Sanjeev Kumar Jha and published by Frontiers Media SA. This book was released on 2023-03-17 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 898 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Climate Change Impacts on Water Resources written by Ramakar Jha and published by Springer Nature. This book was released on 2021-03-27 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides insights and a capacity to understand the climate change phenomenon, its impact on water resources, and possible remedial measures. The impact of climate change on water resources is a global issue and cause for concern. Water resources in many countries are extremely stressed, and climate change along with burgeoning populations, the rise in living standards, and increasing demand on resources are factors which serve to exacerbate this stress. The chapters provide information on tools that will be useful to mitigate the adverse consequences of natural disasters. Fundamental to addressing these issues is hydrological modelling which is discussed in this book and ways to combat climate change as an important aspect of water resource management.

Download or read book Spatial and Temporal Variations in Streamflow Dissolved Solids Nutrients and Suspended Sediment in the Rio Grande Valley Study Unit Colorado New Mexico and Texas 1993 95 written by Stephanie J. Moore and published by . This book was released on 2002 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book International Journal of Advanced Remote Sensing and GIS written by Cloud Publications and published by Cloud Publications. This book was released on 2012-01-01 with total page 3465 pages. Available in PDF, EPUB and Kindle. Book excerpt: International Journal of Advanced Remote Sensing and GIS (IJARSG, ISSN 2320 – 0243) is an open-access peer-reviewed scholarly journal publishes original research papers, reviews, case study, case reports, and methodology articles in all aspects of Remote Sensing and GIS including associated fields. This Journal commits to working for quality and transparency in its publishing by following standard Publication Ethics and Policies.

Download or read book Soil and Water Contamination written by Marcel van der Perk and published by CRC Press. This book was released on 2006-08-10 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook provides an overview of transport and fate processes of environmental contamination, in such a way that the reader can both understand and predict contaminant patterns in soil, groundwater, and surface water. In contract to most existing texts, soil and water pollution are treated as integrated environmental matter from a geographical/spatial perspective at point, local, regional, and catchment scales. The spatial approach links up with recent developments and trends in environmental legislation and other integrated catchment management initiatives. It consists of four coherent parts: 1. Introduction to soil and water contamination; 2. Source, role, and behavior of substances in soil and water; 3. Transport and fate processes of substances in soil and water; and 4. Patterns of substances in soil and water. Intended for undergraduate and graduate students in Earth and Environmental Sciences, who understand the fundamentals of chemistry, hydrology and soil science; may also serve as a useful reference for professionals.

Download or read book Soil and Water Contamination 2nd Edition written by Marcel van der Perk and published by CRC Press. This book was released on 2013-11-15 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil and Water Contamination, Second Edition gives a structured overview of transport and fate processes of environmental contaminants. Dealing with all topics essential for understanding and predicting contaminant patterns in soil, groundwater and surface water, it contributes to the formation of a solid basis for adequate soil and water pollution control and integrated catchment management. A unique feature of this work is that it does not treat water and soil pollution as independent processes, but as components of an integrated whole. The core of this geoscientific approach is divided into four parts: • Introduction to the basics of soil and water contamination, such as the fundamentals of environmental pollution and chemistry and the basic properties of soil, groundwater and surface water. • Source, role, and behaviour of substances in soil and water, treating natural and anthropogenic sources of nutrients, heavy metals, radionuclides and organic pollutants as well as emerging substances of concern, their physico-chemical characteristics, behaviour, and toxicity. • Transport and fate of substances in soil and water, focusing on processes of transport, exchange and transformations like advection, dispersion, adsorption kinetics and biochemical decay. Special attention is paid to the mathematical description and modelling of these processes. • Patterns of substances in soil and water, explaining spatial and temporal patterns of pollutants in soil, groundwater, and surface water, illustrated by recent case studies from fundamental and applied research. This comprehensive, successful textbook, now in its second edition, has been conscientiously updated and extended and includes many case studies, examples and exercises sections, providing undergraduate and graduate students in the Earth and Environmental Sciences with all the material necessary for the study of soil and water contamination. In addition, it can serve as a useful source of information for professionals.