scholarly journals Hydro-Morphological Characteristics Using Flow Duration Curve, Historical Data and Remote Sensing: Effects of Land Use and Climate

Water ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 309 ◽  
Author(s):  
Philip Kibet Langat ◽  
Lalit Kumar ◽  
Richard Koech ◽  
Manoj Kumer Ghosh
Keyword(s):  
Climate Change ◽  
Land Use ◽  
Active Sites ◽  
Water Resource Management ◽  
Morphological Characteristics ◽  
Flow Duration Curve ◽  
Flow Duration ◽  
Tana River ◽  
Downstream Reach ◽  
History Of

Ecohydrological changes in large rivers of the world result from a long history of humandimensions and climate. The increasing human population, intensified land use, and climate change haveled to a decline in the most critical aspect of achieving sustainable development, namely, that of waterresources. This study assessed recent hydromorphological characteristics of the tropical Tana River inKenya using flow duration curve, and geospatial techniques to gain a better understanding of humanimpacts over the last two decades and their consequences for new development projects. The results showthat all extremal peak, low, and mean discharges exhibited significant increasing trends over a period of17 years. Dam construction represents a 13% reduction of the maximum discharge and a 30% decrease inlow flows, while post-regulation hydrological changes indicated an increase of 56 and 40% of high flowsand low flows respectively. Dominant flow was observed to be higher for the current decade than theprevious decade, representing a rise of the dominant streamflow by 33%. The assessment of fourmorphologically active sites at the downstream reach showed channel adjustments which support thechanges in the flow regimes observed. The channel width increased by 8.7 and 1.9% at two sites butdecreased by 31.5 and 16.2% for the other two sites under study during the time period. The resultsunderscore the contribution of other main human modifications, apart from regulation, such as increasedwater abstraction and inter basin transfer, up-stream land use and anthropogenic climate change to assessthe ecohydrological status in this river basin. Such streamflow regime dynamics may have implicationson water resource management, riverine environments, and development of new water projects.

scholarly journals Seasonality and multiannual variability of floods: case study from Eastern Poland

2018 ◽  
Vol 23 ◽  
pp. 00031
Author(s):  
Grzegorz Siwek
Keyword(s):  
Climate Change ◽  
Flow Duration Curve ◽  
Distribution Analysis ◽  
Climate Change Effects ◽  
Flow Duration ◽  
Flood Season ◽  
Seasonality Index ◽  
Annual Distribution ◽  
Flood Characteristics

Nowadays, under increasing climate change effects on the environment, we can observe increasing number of extreme phenomena, including meteorological and hydrological ones. One of such phenomena are floods. The objective of this article is the assessment of basic flood characteristics seasonality in the annual distribution. Analysis were performed based on time series of daily flow values recorded in the years 1951–2014 in three gauging stations located on rivers in Easter Poland, in upper Wieprz catchment. Floods were defined according to TLM algorithm and were assumed to be all cases of flow occurrence exceeding 10% read from FDC (flow duration curve) (Q10). Seasonality was analysed using Markham’s Seasonality Index and Period of Seasonal Concentration, analysis of autocorrelation function (ACF) as well as proposed by the author Seasonal Winter Floods Index. The distribution of floods during year indicates one flood season in year which occurs in the spring.

Evaluation of the impacts of climate change and land-use dynamics on water resources: The case of the Lobo River watershed: Central-Western Côte d'Ivoire

2021 ◽  
Author(s):  
Berenger Koffi ◽  
Zilé Alex Kouadio ◽  
Affoué Berthe Yao ◽  
Kouakou Hervé Kouassi ◽  
Martin Sanchez Angulo ◽  
...  
Keyword(s):  
Climate Change ◽  
Land Use ◽  
Water Resources ◽  
Water Resource Management ◽  
Climate Model ◽  
Regional Climate ◽  
Mean Annual Temperature ◽  
Climate Change Scenarios ◽  
River Watershed ◽  
Impacts Of Climate Change

<p>Meeting growing water needs in a context of increasing scarcity of resources due to climate change and changes in land use is a major challenge for developing countries in the coming years. The watershed of the Lobo river in Nibéhibé does not escape this dilemma. The water retention of the Lobo River and its watershed play an important role in the subsistence of the inhabitants of the region. However, the watershed is currently subject to strong human pressures mainly associated with the constant increase in human population and intensification of agricultural activities. The main objective of this study is to assess the impacts of climate change on the water resources of the Lobo River watershed at Nibéhibé in the central-western part of Côte d'Ivoire. Two climate change scenarios (RCP4.5 and RCP8.5) were established using the regional climate model RCA4 (Rossby Centre atmospheric model 4) and the flows under these scenarios were simulated by the hydrological model CEQUEAU with respect to a reference period (1986-2005). The RCA4 regional model predicts an increase of 1.27° C; 2.58° C in the horizon 2021-2040 and 2051-2070 in mean annual temperature. Rainfall would also experience a significant average annual decrease of about 6.51% and 11.15% over the period 2021-2040 and 2041-2070. As for the evolution of flows, the Cequeau model predicts a decrease in the runoff and infiltration of water on the horizon 2021-2040 and an increase in evapotranspiration over time according to the RCP4.5 scenario. However, the model predicts an increase in runoff at the expense of a decrease in REE and infiltration at the horizon 2040-2070 according to scenario RCP8.5. It appears from this study that surface flows and infiltrations, which constitute the water resources available to meet the water needs of the basin's populations, will be the most affected. The results obtained in this study are important and could contribute to guide decision making for sustainable water resource management.</p>

Assessing the Impacts of Climate Change and Land Use/Cover Change on Runoff Based on Multiple Water-Energy Balance Models

2020 ◽  
Author(s):  
Manling Xiong
Keyword(s):  
Climate Change ◽  
Land Use ◽  
Energy Balance ◽  
Water Resource Management ◽  
Potential Evapotranspiration ◽  
Heihe River ◽  
Runoff Variation ◽  
Runoff Change ◽  
Energy Balance Models ◽  
Impacts Of Climate Change

<p>The runoff in river systems has been significantly changed by climate change and land use/cover change (LUCC), while the magnitude and patterns vary because of the factors. Investigating the major factor impacting runoff variation is necessary for water resource management. In this work, five different water-energy balance models are used to analyze the cause of runoff variations; of these models, three are based on the Budyko framework and two are based on the ecohydrological conceptual framework. The approach is demonstrated using the upper-midstream of the Heihe Rivers. The results suggest LUCC is the dominant cause of runoff change in the range of 59.92% ~ 65.14%. The estimated impacts of climate change and LUCC are consistent among the five models. Cropping is the major human activity resulting in LUCC at the upper-midstream of the Heihe River. Meanwhile, the change in runoff is more sensitive to precipitation than to potential evapotranspiration. Our work summarizes five widely used water-energy balance models used to explain the impacts of climate change and LUCC on runoff, which may be of importance in explaining the mechanism of runoff change.</p>

scholarly journals Analyzing the impacts of climate and land use changes on the water quality in the 3S river basin

2019 ◽  
Vol 2 (2) ◽  
pp. 125-131
Author(s):  
Loi Thi Pham ◽  
Khoi Nguyen Dao
Keyword(s):  
Climate Change ◽  
Water Quality ◽  
Land Use ◽  
Water Resources ◽  
Land Use Change ◽  
River Basin ◽  
Water Resource Management ◽  
Hydrological Modeling ◽  
Swat Model ◽  
The Impact

Assessing water resources under the influence of environmental change have gained attentions of scientists. The objective of this study was to analyze the impacts of land use change and climate change on water resources in terms quantity and quality in the 3S basin in the period 1981–2008 by using hydrological modeling (SWAT model). The results showed that streamflow and water quality (TSS, T-N, and T-P) tend to increase under individual and combined effects of climate change and land use change. In addition, the impact of land use change on the flow was smaller than the climate change impact. However, water balance components and water quality were equally affected by two factors of climate change and land use change. In general, the results of this study could serve as a reference for water resource management and planning in the river basin.

Sustainable Land Use and Watershed Management in Response to Climate Change Impacts

2017 ◽  
pp. 255-295
Author(s):  
Nguyen Kim Loi ◽  
Nguyen Thi Huyen ◽  
Le Hoang Tu ◽  
Vo Ngoc Quynh Tram ◽  
Nguyen Duy Liem ◽  
...  
Keyword(s):  
Climate Change ◽  
Land Use ◽  
Land Use Change ◽  
Stream Flow ◽  
Water Resource Management ◽  
Swat Model ◽  
Sustainable Land Use ◽  
Critical Issues ◽  
Gis Environment ◽  
Soil And Water

The Srepok river basin (28,600km2) is located in the Central Highlands of Vietnam. There are many critical issues for soil and water resource management in the basin. Therefore, to make suitable adaptation plans, decision makers need to understand the extent of the potential impact of both climate change and human activity on local soil and water resources. The objective of this chapter was to investigate changes in stream flow, sediment load, and hydrological processes resulting from land use change and climatic variation. Plausible scenarios of land use change developed in a GIS environment based on current conditions, information from the area, and climate change scenarios were built on outputs of GCMs from the SEA-START. These changes were then inputted into SWAT model to project future hydrological variables. Results demonstrated that stream flow was predominant, followed by evapotranspiration. Groundwater was more predominant than surface water. This has been one of the best outstanding advantages in the Srepok watershed.

Sustainable Land Use and Watershed Management in Response to Climate Change Impacts

2017 ◽  
pp. 116-156
Author(s):  
Nguyen Kim Loi ◽  
Nguyen Thi Huyen ◽  
Le Hoang Tu ◽  
Vo Ngoc Quynh Tram ◽  
Nguyen Duy Liem ◽  
...  
Keyword(s):  
Climate Change ◽  
Land Use ◽  
Land Use Change ◽  
Stream Flow ◽  
Water Resource Management ◽  
Swat Model ◽  
Sustainable Land Use ◽  
Critical Issues ◽  
Gis Environment ◽  
Soil And Water

The Srepok river basin (28,600km2) is located in the Central Highlands of Vietnam. There are many critical issues for soil and water resource management in the basin. Therefore, to make suitable adaptation plans, decision makers need to understand the extent of the potential impact of both climate change and human activity on local soil and water resources. The objective of this chapter was to investigate changes in stream flow, sediment load, and hydrological processes resulting from land use change and climatic variation. Plausible scenarios of land use change developed in a GIS environment based on current conditions, information from the area, and climate change scenarios were built on outputs of GCMs from the SEA-START. These changes were then inputted into SWAT model to project future hydrological variables. Results demonstrated that stream flow was predominant, followed by evapotranspiration. Groundwater was more predominant than surface water. This has been one of the best outstanding advantages in the Srepok watershed.

scholarly journals Quantifying the Contributions of Climate Change and Human Activities to Water Volume in Lake Qinghai, China

2021 ◽  
Vol 14 (1) ◽  
pp. 99
Author(s):  
Guoqing Yang ◽  
Miao Zhang ◽  
Zhenghui Xie ◽  
Jiyuan Li ◽  
Mingguo Ma ◽  
...  
Keyword(s):  
Climate Change ◽  
Land Use ◽  
Volume Change ◽  
Lake Water ◽  
Human Activities ◽  
Water Resource Management ◽  
Assessment Tool ◽  
Water Volume ◽  
Lake Qinghai ◽  
Adaptation To Climate Change

Lake Qinghai has shrunk and then expanded over the past few decades. Quantifying the contributions of climate change and human activities to lake variation is important for water resource management and adaptation to climate change. In this study, we calculated the water volume change of Lake Qinghai, analyzed the climate and land use changes in Lake Qinghai catchment, and distinguished the contributions of climate change and local human activities to water volume change. The results showed that lake water volume decreased by 9.48 km3 from 1975 to 2004 and increased by 15.18 km3 from 2005 to 2020. The climate in Lake Qinghai catchment is becoming warmer and more pluvial, and the changes in land use have been minimal. Based on the Soil and Water Assessment Tool (SWAT), land use change, climate change and interaction effect of them contributed to 7.46%, 93.13% and −0.59%, respectively, on the variation in surface runoff into the lake. From the perspective of the water balance, we calculated the proportion of each component flowing into and out of the lake and found that the contribution of climate change to lake water volume change was 97.55%, while the local human activities contribution was only 2.45%. Thus, climate change had the dominant impact on water volume change in Lake Qinghai.

scholarly journals The Land Sector in the 2030 EU Climate Change Policy Framework: a Look At The Future

2019 ◽  
Vol 16 (2) ◽  
pp. 148-164 ◽  
Author(s):  
Annalisa Savaresi ◽  
Lucia Perugini
Keyword(s):  
Climate Change ◽  
Land Use ◽  
Land Use Change ◽  
Emission Reduction ◽  
Climate Change Policy ◽  
Policy Framework ◽  
Change Policy ◽  
History Of ◽  
Emission Reduction Target ◽  
First Time

Under the recently adopted 2030 EU climate change policy framework, land use, land use change and forestry (lulucf) will for the first time contribute to the EU’s economy wide emission reduction target. This article looks at the history of the lulucf Regulation, analysing its contents in light of the history of international and regional efforts to regulate emissions and removals in this specific sector. It highlights the challenges associated with regulating this specific sector and reviews the regulation, assessing how well it has addressed these challenges.

Diné Clans and Climate Change: A Historical Lesson for Land Use Today

2019 ◽  
Vol 43 (1) ◽  
pp. 55-82
Author(s):  
Klara Kelley ◽  
Harris Francis
Keyword(s):  
Climate Change ◽  
Land Use ◽  
Political Instability ◽  
Settler Colonialism ◽  
Traditional System ◽  
History Of ◽  
Permit System

This paper presents the history of the Diné (Navajo) system of kinship and clanship as a response to environmental and political instability. We describe the Diné traditional system of k'éí, kinship and clanship, held together by k'é, the ethic of universal relatedness, and how, after 1930, the system has fared under conquest, settler colonialism, climate change, and replacement with a government-administered grazing-permit system. As long recognized, through the k'é principle, the clan system distributed people on the land flexibly in response to unstable conditions for farming and stock raising. Less understood is that, through kéí—the mutual rights and responsibilities of clan relatives—the system also limited that flexibility to make the distribution more orderly.

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