Regional Hydrological Drought Monitoring Using Principal Components Analysis

Arabzadeh, Rezgar; Kholoosi, Mohammad Mehdi; Bazrafshan, Javad

doi:10.1061/(asce)ir.1943-4774.0000925

Cited by 23 publications

(8 citation statements)

References 21 publications

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“…The hydrologic alteration of 33 hydrologic parameters and overall hydrologic alteration were presented during the pre-dam and post-dam operation periods. Secondly, we used a principal component analysis (PCA) [51][52][53], to determine the relevance of various hydrologic parameters obtained by the IHA and selected those that have a cumulative contribution rate of 70-90%. These parameters serve as indicators related to the area of riparian wetlands.…”

Section: Quantifying Relationship Of Riparian Wetland Change With Hydmentioning

confidence: 99%

Dam Effects on Downstream Riparian Wetlands: The Nenjiang River, Northeast China

Zheng

Zhang

et al. 2019

Water

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Many studies have found that damming a river can change downstream hydrology, sediment transport, channel morphology, and fish habitat. However, little is known about river dam effects on downstream riparian wetland dynamics and their quantitative relationship with hydrological alterations. In this study, hydrological time series and wetland distribution data spanning nearly 40 years (1978–2016) before and after the construction of a large dam in 2005 across the Nenjiang River in Northeast China were used to reveal the impact of dam on the downstream discharge regime and wetland degradation. Hydro-statistical and stepwise multiple regression analyses were performed to quantify the relationship of riparian wetland area with a metrics of 33 hydrological indicators. Dam construction caused decline in peak discharge, flood frequency, and magnitude. Moreover, 150 km riparian wetlands along the downstream of the dam was largely reduced. The count and duration of high flow pulses, 1-day maximum, and date of maximum discharge changed significantly after the dam construction. The hydrological changes have made a significant contribution to the 44% reduction in riparian wetlands following the dam construction. Our results indicated that hydrological alterations caused by dam regulation led to the area reduction of downstream riparian wetlands. The findings provide relevant information for developing best dam operation practices to protect and restore downstream wetland ecosystems.

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Section: Quantifying Relationship Of Riparian Wetland Change With Hydmentioning

confidence: 99%

Dam Effects on Downstream Riparian Wetlands: The Nenjiang River, Northeast China

Zheng

Zhang

et al. 2019

Water

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“…Same studies were conducted by Chen et al 33 in Taiwan and by Zhang et al 34 in China. Hong et al 35 , Arabzadeh et al 36 , Gumus and Algin 37 and Dikici 38 conducted drought analysis studies by using runoff data. SPI index is also applied in other studies focusing on regional drought 39 , 40 .…”

Section: Introductionmentioning

confidence: 99%

Drought analysis with different indices for the Asi Basin (Turkey)

Dikici

2020

Sci Rep

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Today, within the scope of planning, development and management of water resources affected adversely by climate change, the issue of minimization of the adverse effects of drought has become very important. In this study, drought risk analyses were performed using meteorological, hydrogeological and hydrological data of the Asi basin and as a result of the determination of different indices and indicators available in the literature. First, the missing data was completed by regional analyses. The DI (Deciles Index), SPI (Standardized Precipitation Index), SPEI (Standardized Precipitation Evapotranspiration Index) and SRI (Standardized Runoff Index) indices were described. Drought severity and magnitude were found according to these indices. Based on 1, 3, 6, 9, 12, 48-month recurrence intervals, analyses were made. Classification of droughts and their threshold values were determined. For some places, drought incidence rates were presented according to each index. The indices were compared, the correlation between them was examined and a common conclusion was reached. The drought severities, which has a precipitation area of 7800 m2, were evaluated for certain recurrence intervals. For this purpose, based on meteorological, hydrological and hydrogeological data for the years between 1970 and 2016, DI, SPI, SPEI, and SRI indices were analyzed and compared.

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“…Unlike the computationally intensive procedures, Nalbantis and Tsakiris [13] developed the streamflow drought index (SDI) to predict drought onset and duration using cumulative streamflow volumes. Hydrological drought analysis based on SDI has been conducted in several areas such as the Northern Peloponnese in the Achaia and Korinthia Prefectures in Greece [14], the northwest of Iran [9], the junction of the upper Yangtze River and the middle Yangtze River in China [15], the Diyala River Basin shared between Iraq and Iran [16], the Neman River Basin in Europe [17], the Sefid-Rud Basin in the Iran plateau [18], and the Kucuk Menderes Basin in Turkey [19]. In some research areas, such as the Cetina River catchment area in Croatia [20], Vistula River in Poland [21,22], the Great Plains states of the United States [23], and 121 near-natural catchments in the United Kingdom [24], droughts were monitored simultaneously using hydrological and meteorological drought indexes.…”

Section: Introductionmentioning

confidence: 99%

A 40-Year Analysis of the Hydrological Drought Index for the Tigris Basin, Turkey

Ozkaya

Zerberg²

2019

Water

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Drought is a natural disaster that occurs globally when water availability is significantly below normal levels. Drought assessment is important for water resource planning, and therefore indexes can be used to characterize drought magnitudes. Using the monthly streamflow data at 47 stations from 1972 to 2011, the streamflow drought index (SDI) series with 3- (SDI-3), 6- (SDI-6), and 12-month (SDI-12) time scales were calculated, and the hydrological drought of the upper Tigris Basin in Turkey has been assessed. The results showed that almost all stations experienced at least one severe drought during the study period. The results revealed that since the early 1990s the study area has become drier. Using the data for a 12-month period and the area of the sub-basins for each flow monitoring station, area-weighted SDI-12 (WSDI) values were constructed. According to the WSDI results, the intensity and number of drought conditions increased during every 10-year period. This outcome has been verified using the maps of averaged SDI-12 values over the Tigris Basin. We noticed from observations of the maps that the time domain zones in lower latitudes experienced drought earlier as compared with zones in higher latitudes.

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Regional Hydrological Drought Monitoring Using Principal Components Analysis

Cited by 23 publications

References 21 publications

Dam Effects on Downstream Riparian Wetlands: The Nenjiang River, Northeast China

Dam Effects on Downstream Riparian Wetlands: The Nenjiang River, Northeast China

Drought analysis with different indices for the Asi Basin (Turkey)

A 40-Year Analysis of the Hydrological Drought Index for the Tigris Basin, Turkey

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