Impact of climate change on sediment yield for Naran watershed, Pakistan

Azim, Farooq; Shakir, Abdul Sattar; Habib-ur-Rehman, _; Kanwal, Afshan

doi:10.1016/j.ijsrc.2015.08.002

Cited by 28 publications

(22 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…from climate change has also been reported by many scholars [12,17,26,54,55]. In a similar study, average annual sediment loads generally decreased in response to climate change by 23.5% and 3.3% under RCP4.5 and RCP8.5, respectively in the mid-century (2046-2065) [15].…”

Section: Effect Of Climate Change On Lake Sedimentationsupporting

confidence: 79%

“…It has been revealed in a study conducted by Adem et al [51] in the Upper Gilgel Abay of the Blue Nile Basin in Ethiopia that sediment yield was related to a change in climate variables and thus to streamflow. The variation in the values of sediment yield due to streamflow change that resulted from climate change has also been reported by many scholars [12,17,26,54,55]. In a similar study, average annual sediment loads generally decreased in response to climate change by 23.5% and 3.3% under RCP4.5 and RCP8.5, respectively in the mid-century (2046-2065) [15].…”

Section: Effect Of Climate Change On Lake Sedimentationsupporting

confidence: 74%

“…Figures 8 and 9 depict that there will a decrease in the average monthly sediment yield for both rivers under both scenarios during the rainy season (July, August, and September) in the scenario period (2041-2070) as compared to the historical period (1985-2010). The estimated sediment yield in ton/year was changed to volume basis using a reservoir trap efficiency [29] from climate change has also been reported by many scholars [12,17,26,54,55]. In a similar study, average annual sediment loads generally decreased in response to climate change by 23.5% and 3.3% under RCP4.5 and RCP8.5, respectively in the mid-century (2046-2065) [15].…”

Section: Effect Of Climate Change On Lake Sedimentationsupporting

confidence: 61%

See 2 more Smart Citations

The Effect of Climate Change on Loss of Lake Volume: Case of Sedimentation in Central Rift Valley Basin, Ethiopia

et al. 2018

View full text Add to dashboard Cite

Evaluating the impact of climate change on sediment yield has become one of the major topics in climate research. The purpose of this study was to investigate sediment yield contribution to lake volume change under changing climatic conditions in the Central Rift Valley Basin. The ensemble mean of five regional climate models (RCMs) in the coordinated regional climate downscaling experiment (CORDEX)-Africa was considered for the purpose of this study. The climate variables (precipitation, minimum and maximum temperatures) in RCMs were bias corrected against observed data using linear scaling (LS), power transformation (PT), variance of scaling (VS), and quantile mapping (QM). Two emission scenarios, the Representative Concentration Pathways, RCP4.5 and RCP8.5, were considered for the future scenario period . Better results were obtained when the ensemble values of the bias correction methods were used. Hence, the projected values of climate variables after bias correction were used in the Soil and Water Assessment Tool (SWAT) hydrological model to estimate the sediment yield contribution to lake volume change due to climate change. The results show that the average projected precipitation will decrease by 7.97% and 2.55% under RCP4.5 and RCP8.5, respectively. On average, the maximum temperature will increase by 1.73 • C and 2.36 • C under RCP4.5 and RCP8.5, respectively, while the minimum temperature will increase by 2.16 • C and 3.07 • C under RCP4.5 and RCP8.5, respectively. The average annual sediment yield contributions to Lake Ziway were 431.05 ton/km 2 and 322.82 ton/km 2 for the Meki and Ketar rivers, respectively, in the historical period . The study also reveals that the annual sediment yield that was estimated for the Meki River was 323 ton/km 2 and 382 ton/km 2 under RCP4.5 and under RCP8.5, respectively. The sediment estimations for the Ketar River were 157 ton/km 2 and 211 ton/km 2 under RCP4.5 under RCP8.5, respectively. This will decrease the rate of volume change in Lake Ziway by 38% under RCP4.5 and by 23% under RCP8.5. The results show that the life expectancy of the lake is likely to increase under climate change scenarios. This will help water resources managers make informed decisions regarding the planning, management, and mitigation of the river basins.Hydrology 2018, 5, 67 2 of 18 reservoirs, ponds, and rivers. The sedimentation of the water bodies reduces their capacity and the useful lifespan of the reservoir. Sediment yield can be described as the amount of sediment that would enter into a reservoir located at the outlet of the basin [1]. It is the net result of soil erosion and processes of sediment accumulation, so it depends on variables that control water and sediment discharge to reservoirs [2]. Sediment yield is influenced by many factors, which include topography, soil, climate, land use, and drainage characteristics [3][4][5][6]. The problem of sedimentation is aggravated by human activities and climate change. A study conducted by Belete [7] on Lake Hawasa showed that sediment...

show abstract

Section: Effect Of Climate Change On Lake Sedimentationsupporting

confidence: 79%

Section: Effect Of Climate Change On Lake Sedimentationsupporting

confidence: 74%

Section: Effect Of Climate Change On Lake Sedimentationsupporting

confidence: 61%

See 1 more Smart Citation

The Effect of Climate Change on Loss of Lake Volume: Case of Sedimentation in Central Rift Valley Basin, Ethiopia

et al. 2018

View full text Add to dashboard Cite

show abstract

“…To this end, four commonly accepted criteria viz. standardized precipitation index (SPI), low and high flow discharges (LFD and HFD), and sediment yield as most important driving forces and response indicators at the watershed scale (Mishra & Nagarajan, ; Fang et al, ; Azim et al, ; Davudirad et al, ; Sorribas et al, ) were selected to analyze the health of the Shazand Watershed based on the R el R es V ul framework.…”

Section: Methodsmentioning

confidence: 99%

Watershed Health Characterization Using Reliability–Resilience–Vulnerability Conceptual Framework Based on Hydrological Responses

Hazbavi

Sadeghi

2017

Land Degrad Dev

View full text Add to dashboard Cite

An attempt was made to employ the reliability (Rel)–resilience (Res)–vulnerability (Vul) conceptual framework to develop a typical indicator system for quantitative assessment of watershed health. The study aimed to conceptualize and customize the RelResVul framework to watershed health assessment for the Shazand Watershed in Markazi Province, Iran, for the period of 1977–2014. To this end, four easily, reliable, available and accessible criteria viz. standardized precipitation index (SPI), low and high flow discharges (LFD and HFD), and suspended sediment concentration (SSC) were selected, and corresponding indices for reliability–resilience–vulnerability (RelResVul) framework were accordingly conceptualized and calculated. The thresholds of 0.1, 0.16 m3 s−1, 12.63 m3 s−1 and 25 mg l−1 day−1 were thus selected for SPI, LFD, HFD and SSC, respectively. The results showed a decreasing trend in Rel and Res, and an increasing trend in Vul for SPI and LFD in the Shazand Watershed. The results further showed an increasing trend in Rel, and a decreasing trend in Vul for HFD and SSC. A decreasing trend was ultimately recognized in watershed health index for all criteria except SSC. Additionally, the integrated hydrological watershed health index of 0.16 ± 0.11 obtained from the geometric mean of the RelResVul framework indices also showed a decreasing trend for the Shazand Watershed health during the study period. The results of the present initiative study can be considered as a baseline by decision makers and managers to effectively adjust watershed management strategies to handle land degradation issues in the area. Copyright © 2016 John Wiley & Sons, Ltd.

show abstract

“…Although there are many studies assessing the climate-induced adverse impacts on the UIB river flow patterns [13][14][15][16][17][18][19], few have investigated the impact of flow pattern changes on the sediment load capacity [20,21]. Furthermore, the studies conducted in this regard differ widely in their suggested estimates.…”

Section: Introductionmentioning

confidence: 99%

Variability and Trend Detection in the Sediment Load of the Upper Indus River

Ateeq-Ur-Rehman

Bui

Rutschmann

2017

Water

View full text Add to dashboard Cite

Water reservoirs planned or constructed to meet the burgeoning energy and irrigation demands in Pakistan face a significant loss of storage capacity due to heavy sediment load from the upper Indus basin (UIB). Given their importance and the huge investment, assessments of current UIB sediment load and possible future changes are crucial for informed decisions on planning of optimal dams' operation and ensuring their prolonged lifespan. In this regard, the daily suspended sediment loads (SSLs) and their changes are analyzed for the meltwater-dominated zone up to the Partab Bridge and the whole UIB up to Besham Qila, which is additionally influenced by monsoonal rainfall. The gaps between intermittent suspended sediment concentration (SSC) samples are filled by wavelet neural networks (WA-ANNs) using discharges for each site. The temporal dynamics of SSLs and discharges are analyzed using a suite of three non-parametric trend tests while the slope is identified using Sen's slope estimator. We found disproportional spatio-temporal trends between SSLs and discharges caused primarily by intra-annual shifts in flows, which can lead to increased trap efficiency in planned reservoirs, especially upstream of Besham Qila. Moreover, a discernible increase in SSLs recorded at Partab Bridge during summer is being deposited downstream in the river channel. This is due to a decrease in river transport capacity in the monsoonal zone. These findings will not only help to identify these morphological problems, but also accurately anticipate the spatio-temporal changes in the sediment budget of the upper Indus River. Our results will help improve reservoir operational rules and sediment management strategies for existing and 30,000-MW planned dams in the UIB.

show abstract

Impact of climate change on sediment yield for Naran watershed, Pakistan

Cited by 28 publications

References 16 publications

The Effect of Climate Change on Loss of Lake Volume: Case of Sedimentation in Central Rift Valley Basin, Ethiopia

The Effect of Climate Change on Loss of Lake Volume: Case of Sedimentation in Central Rift Valley Basin, Ethiopia

Watershed Health Characterization Using Reliability–Resilience–Vulnerability Conceptual Framework Based on Hydrological Responses

Variability and Trend Detection in the Sediment Load of the Upper Indus River

Contact Info

Product

Resources

About