Reliability of sediment rating curves for a deciduous forest watershed in Iran

Sadeghi, Seyed Hamidreza; Pari, Saeidi

doi:10.1080/02626667.2010.489797

Cited by 41 publications

(36 citation statements)

References 47 publications

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“…SL analysis, however, indicated that precipitation had the greatest impact on the amount of SL in the Kojour forest watershed, which agreed with Lana-Renault and Reg€ u es [35]. Furthermore, SL has been strongly influenced by human interferences such as sand and gravel mining in addition to precipitation and river hydrological conditions, which was similarly reported by Sadeghi and Saeidi [46] in the same watershed, Jabbari and Farzi [58] in Razavar River, Iran, and Sracek et al [59] in Kafue River, Zambia.…”

Section: Temporal Variation Of Suspended Loadsupporting

confidence: 84%

Temporal Variation of Bed Load to Suspended Load Ratio in Kojour River, Iran

Sadeghi

Kheirfam

2015

CLEAN Soil Air Water

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Analysis of the river sediment transport variability under different temporal and hydrological conditions is important in hydraulics, hydrological, and soil and water conservation science and engineering. However, few studies have been conducted to study bed load (BL) and consequently BL to suspended load (SL) relationships and temporal variation of this ratio. The present study was, therefore, conducted to evaluate the temporal variation of the BL–SL ratio in the main river of the Educational and Research Forest Watershed of Tarbiat Modares University (Kojour), Iran. BL, SL, and discharge were simultaneously measured from July 2011 to June 2012, under different hydrological conditions, at a flume located at the main outlet of the watershed. The BL–SL ratios were then analyzed under different conditions, which showed that the discharge, SL, BL, and BL–SL ratio during the study period varied between 60 and 780 L s−1, 2 and 2786 mg L−1, 0.0005 and 13 mg L−1, and 0.01–8.1%, respectively. The mean ratios of the BL–SL ratio in summer, autumn, winter, and spring were 0.16, 0.86, 4.6, and 0.8%, respectively, with standard deviations of 0.067, 0.95, 2.73, and 0.56%, respectively. The mean ratio of BL–SL was about 1%, which is very low compared to figures off‐reported. Flow discharge, precipitation, and sand and gravel mining were also recognized as important factors affecting the temporal variability of BL–SL ratio in the study area.

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Section: Temporal Variation Of Suspended Loadsupporting

confidence: 84%

Temporal Variation of Bed Load to Suspended Load Ratio in Kojour River, Iran

Sadeghi

Kheirfam

2015

CLEAN Soil Air Water

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“…The high correlations between TF and gross precipitation have already been reported by former researches (e.g., Carlyle-Moses, 2004;Gurav et al, 2012;Park and Cameron, 2008;Shachnovich et al, 2008) as 0.998, 0.988, 0.996 and 0.979, respectively for different forest stands throughout the globe. The correlation results also showed that the influence of canopy cover to absorb the rainfall was significant just for rain events smaller than 30 mm.…”

Section: Discussionmentioning

confidence: 56%

“…Improving our understanding about rainfall partitioning in forests ecosystems is very important for studies that focus on forest hydrology to better management and decision making on this vital ecosystems (Ajami et al, 2011;Brecciaroli et al, 2012;Davudirad et al, 2015;Dohnal et al, 2014;Frot et al, 2007;Holko et al, 2009;Xu et al, 2014). Such eco-hydrological studies lead to a proper hydrological balance analysis and therefore have been well considered in forest hydrology studies during last few decades (Adriaenssens et al, 2012;Bosch and Hewlett, 1982;Carlyle-Moses, 2004;Devlaeminck et al, 2005;Gurav et al, 2012;Marin et al, 2000;Llorens and Domingo, 2007;Mitchell et al, 1986;Molina and Campo, 2012;Nanko et al, 2006;Park and Cameron, 2008;Rahmani et al, 2011;Shachnovich et al, 2008;Tcherepanov et al, 2005;Xu et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…While the positive roles of Hyrcanian forest in decreasing frequency and intensity of floods and even regulating hydroclimatical conditions of the region are qualitatively known. It is necessarily needed to obtain precise estimations on hydrological components of the Hyrcanian forest to properly develop and calibrate hydrological models Sadeghi and Saeidi, 2010) in the area where the input rainfall is potentially erosive and offensive compared to other parts of Iran (Sadeghi et al, 2011). The present study has been therefore planned to investigate the spatio-temporal variations of throughfall as a main factor in rainfall partitioning in a part of the Hyrcanian plain forests.…”

Section: Introductionmentioning

confidence: 99%

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Spatio-temporal variation of throughfall in a hyrcanian plain forest stand in Northern Iran

Yousefi

Sadeghi

Mirzaee

et al. 2017

Journal of Hydrology and Hydromechanics

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Elucidating segregation of precipitation in different components in forest stands is important for proper forest ecosystems management. However, there is a lack of information on important rainfall components viz. throughfall, interception and stemflow in forest watersheds particularly in developing countries. We therefore investigated the spatiotemporal variation of important component of throughfall for a forest stand in a Hyrcanian plain forest in Noor City, northern Iran. The study area contained five species of Quercus castaneifolia, Carpinus betulus, Populus caspica and Parrotia persica. The research was conducted from July 2013 to July 2014 using a systematic sampling method. Ninetysix throughfall collectors were installed in a 3.5 m × 3.5 m grid cells. The canopy covers during the growing/leaf-on (i.e., from May to November) and non-growing/leaf-off (i.e., from December to March) seasons were approximately 41% and 81%, respectively. The mean cumulative throughfall during the study period was 623±31 mm. The average throughfall (TF) as % of rainfall (TFPR) during leaf-on and leaf-off periods were calculated 56±14% and 77±10%, respectively. TF was significantly (R 2 = 0.97, p = 0.00006) correlated with gross precipitation. Percent of canopy cover was not correlated with TF except when gross precipitation was <30 mm. A comparison between leaf-off and leaf-on conditions indicated a significantly higher TFPR and corresponding hotspots during leaf-on period. TFPR also differed between seasons with a maximum amount in winter (82%). The results of the study can be effectively used by forest watershed managers for better perception of hydrological behavior of the Hyrcanian forest in the north of Iran under different silvicultural circumstances leading to getting better ecosystem services.

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“…Haregeweyn et al, 2012;Vanmaercke et al, 2014) or from data on sediment concentration in streamflow (e.g. Ulke et al, 2009;Sadeghi and Saeidi, 2010) or can be predicted with models (e.g. Walling et al, 2001;De Vente et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Revisiting lake sediment budgets: How the calculation of lake lifetime is strongly data and method dependent

Lemma

Admasu

Dessie

et al. 2017

Earth Surf Processes Landf

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Lake sedimentation has a fundamental impact on lake lifetime. In this paper, we show how sensitive calculation of the latter is to the quality of data available and assumptions made during analysis. Based on the collection of a large new dataset, we quantify the sediment masses (1) mobilized on the hillslopes draining towards Lake Tana (Ethiopia), (2) stored in the floodplains, (3) transported into the lake, (4) deposited in the lake and (5) delivered out from the lake so as to establish a sediment budget. In 2012–2013, suspended sediment concentration (SSC) and discharge measurements were made at 13 monitoring stations, including two lake outlets. Altogether, 4635 SSC samples were collected and sediment rating curves that account for land cover conditions and rainfall seasonality were established for the 11 river stations, and mean monthly SSC was calculated for the outlets. Effects of the floodplain on rivers' sediment yield (SY) were investigated using measurements at both sides of the floodplains. SY from ungauged rivers was assessed using a model that includes catchment area and rainfall, whereas bedload and direct sediment input from lake shores were estimated. As a result, the gross annual SY was c. 39.55 (± 0.15) Mt, dominantly from Gilgel Abay and Gumara Rivers. The 2.57 (± 0.17) Mt sediment deposited in floodplains indicate that the floodplains serve as an important sediment sink. Moreover, annually c. 1.09 Mt of sediment leaves the lake through the two outlets. Annual sediment deposition in the lake was c. 36.97 (± 0.22) Mt and organic matter accumulation was 2.15 Mt, with a mean sediment trapping efficiency of 97%. Furthermore, SSC and SY are generally higher at the beginning of the rainy season because soils in cultivated fields are bare and loose due to frequent ploughing and seedbed preparation. Later in the season, increased crop and vegetation cover lead to a decrease in sediment production. Based on the established sediment budget with average rainfall, the lifetime of Lake Tana was estimated as 764 to 1032 years, which is shorter than what was anticipated in earlier studies. The sedimentation rate of Lake Tana (11.7 ± 0.1 kg m−2 yr−1) is in line with the sedimentation rates of larger lakes in the world, like Lake Dongting and Lake Kivu. Copyright © 2017 John Wiley & Sons, Ltd.

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Reliability of sediment rating curves for a deciduous forest watershed in Iran

Cited by 41 publications

References 47 publications

Temporal Variation of Bed Load to Suspended Load Ratio in Kojour River, Iran

Temporal Variation of Bed Load to Suspended Load Ratio in Kojour River, Iran

Spatio-temporal variation of throughfall in a hyrcanian plain forest stand in Northern Iran

Revisiting lake sediment budgets: How the calculation of lake lifetime is strongly data and method dependent

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