Characteristics of Hydrological and Meteorological Drought Based on Intensity-Duration-Frequency (IDF) Curves

Water, Год журнала: 2023, Номер 15(17), С. 3142 - 3142

Опубликована: Сен. 1, 2023

As a catastrophic phenomenon, drought has destructive impacts on water resources, the environment, and ecosystem. Consequently, plays vital role in risk assessment, resources management, mitigation plans. The main aim of this research is to obtain critical intensity-duration-frequency (IDF) curves provide comprehensive understanding characteristics by considering meteorological Standardized Precipitation Index (SPI), Evapotranspiration (SPEI), hydrological Streamflow (SSI). Critical IDF for index return period selection are identified. Also, new terms defined as specific duration, maximum intensity based curves. results show that SPI3 run theory 500 years higher compared with other indices. In some curves, 2-year 12-month duration timescale not provided. Regarding SPEI12 gave longer duration. With concepts research, presented methodology novel additional practice identify Using any will contribute converting data mathematical calculations into design assessment purposes.

Язык: Английский

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Analysis of Hydrometeorological Characteristics and Water Demand in Semi-Arid Mediterranean Catchments under Water Deficit Conditions

Climate, Год журнала: 2023, Номер 11(7), С. 137 - 137

Опубликована: Июнь 27, 2023

Drought is one of the most complex and poorly understood catastrophes on planet. Between Greek mainland Turkey, there an area Greece known as South Aegean Islands, that experiences water supply issues. As a result, are issues related to socioeconomic growth some these islands, need for transportation by vessels. Water ships Cyclades Dodecanese areas from or other adjacent islands satisfy urgent demands, hand, exceptionally expensive. The situation deteriorates during summer, when drinking needs can reach five times norm, due heavy tourist season. Given conditions, aim this research estimate hydrometeorological calculate balance, determine in three southern (Mykonos, Naxos, Kos), where shortage, particularly summer months tourism activity at its peak. modified Thornthwaite–Mather monthly hydrological balance model was applied balance. Various use datasets (drinking water, irrigation, transportation) were employed quantify demands islands. According results, available (runoff + infiltration) seems be more than sufficient meet Naxos Kos, since it far exceeds increased Yet, appears Mykonos, resources have been nearly entirely utilized, just enough needs. It evident all present significant sources which could growing residents. However, absence necessary exploitation projects, mainly concerning surface runoff, has contributed intense problems importance harvesting projects becomes even under conditions climate change, with decrease annual rainfall likely highly possible scenario, especially arid semi-arid regions.

Язык: Английский

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In-depth Exploration of Temperature Trends in Morocco: Combining Traditional Methods of Mann Kendall with Innovative ITA and IPTA Approaches

Pure and Applied Geophysics, Год журнала: 2024, Номер 181(8), С. 2717 - 2739

Опубликована: Июль 9, 2024

Abstract This study examines trends in minimum and maximum temperatures at various climate stations located different regions of Morocco for a period five decades (1970 to 2019). Mann–Kendall, Sen’s estimator, Innovative Trend Analysis (ITA) Polygon (IPTA) were used the analysis. The results show significant fluctuations, time scales, between all stations. In coastal areas, such as Rabat Sale, fell during January February while other months saw increases. Average Sale tend fall by 0.5 °C. On hand, rose 0.2 A decrease 0.4 °C T min 1.6 max observed higher continental regions, Meknes. Other stations, Fez Sais (0.6 2.6 ) Taza (1.1 showed an upward trend. Trends also vary, with notable increases temperatures, indicating climatic dynamics according altitude locality. particular, ITA highlights increase annual P-value < 0.05 trend slopes ranging from 0.0015 per year 0.0076 Taza. addition, IPTA confirm diversity downward on monthly seasonal highlighting impact geographical factors proximity sea, topography, continentality that contribute formation regional microclimates. highlight change Morocco.

Язык: Английский

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A High-Resolution Analysis of the de Martonne and Emberger Indices Under Different Climate Change Scenarios: Implications on the Natural and Agricultural Landscape of Northeastern Greece

Land, Год журнала: 2025, Номер 14(3), С. 494 - 494

Опубликована: Фев. 27, 2025

This article explores the impacts of climate change on rural and natural landscapes in region Eastern Macedonia Thrace, northeastern Greece. The spatial distributions bioclimatic de Martonne Index phytoclimatic Emberger were calculated at a very high resolution (~500 m) for present conditions (1970–2000), two future time periods (2030–2060; 2070–2100), greenhouse gas concentration scenarios (RCP4.5; RCP8.5). results show significant changes, especially Rhodope Mountain range along almost whole length Greek–Bulgarian border, where forests ecosystem value are located, together with areas Evros river valley, as well coastal zone Aegean Sea. describes processes changes that can significantly modify study area’s landscapes. area reveals shift toward xerothermic environments over time, projected under extreme RCP8.5 scenario. By 2100, projections indicate around 40% agricultural eastern, southern, western regions will face Mediterranean semi-humid conditions, requiring supplemental irrigation sustainability. predicts approximately 42% experience sub-humid mild or cool winters. In comparison, 5% drier humid/sub-humid, warm winter conditions. These foreseen futures propose initial interpretations key landscape conservation, capital, services management.

Язык: Английский

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A Methodological Approach (TOPSIS) to Water Management in Water-Scarce Areas Under Climate Variability Conditions

Climate, Год журнала: 2025, Номер 13(4), С. 78 - 78

Опубликована: Апрель 10, 2025

Efficient and sustainable water management measures are required on Mediterranean islands due to shortages, which exacerbated by climatic variability increased tourist traffic. This study uses a multi-criteria decision analysis (MCDA) approach, specifically Technique for Order of Preference Similarity Ideal Solution (TOPSIS), examine rate strategies three Aegean that face significant shortage: Mykonos, Naxos, Kos. Three main factors were taken into account in the analysis: preventing groundwater depletion, reducing deterioration, managing long-term demands. Expert questionnaires used evaluate eight different alternatives, included reservoir construction, desalination plants, conserving agriculture, network losses. The results Mykonos showed specific preferred such as plants (R2) agricultural conservation (R3), reflect island’s low capacity natural storage. Constructing reservoirs (R1) (R3) prioritized showing significance storage infrastructure large agriculture sector. Kos also supported construction displaying need both practices. least alternative option all was determined be transportation ship (R8). present emphasized localized projects, infrastructures, stakeholder involvement comprehensive approach resources. indicate an integrated takes infrastructure, conservation, policy, they consistent with previous studies Mediterranean. highlights adapted combined achieve resource under offers framework shortages similar regions.

Язык: Английский

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The influence of hydrometeorological factors on tree growth in mountainous watersheds of the Qilian mountains in China

Scientific Reports, Год журнала: 2025, Номер 15(1)

Опубликована: Апрель 23, 2025

To examine the influence of hydrometeorological factors on forest ecosystems, this study focused growth response Qinghai spruce (Picea crassifolia Kom.) to factors, such as soil moisture, relative humidity, vapor pressure deficit, temperature, precipitation and wind speed, in a mountainous watershed. The Dayekou watershed, which is situated Qilian Mountains, was used increase stem diameter based daily-monthly fluctuations, cumulative growth, expansion parameters. diameters six dominant trees (categorized three classes) were recorded using Dendrometer DRL26 tree monitor combined with monitoring data. statistically analyzed. results indicated that daily fluctuation exhibited parabolic pattern, could be divided into stages: contraction (from 10:00 21:00), expanding 21:00 5:00 following day), 11:00 day). monthly also trend, initial (May), rapid (June-July) slow (August-October). At 40 cm depth, water content, air atmospheric all showed positive correlations (P < 0.01), while saturated differential, photosynthetically active radiation negative 0.01). Our demonstrated at depth had highest impact spruce's diameter. Changes these due potential climate change will affect future.

Язык: Английский

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The Effect of Hydrometeorological Factors on Tree Growth (Abies borisii-regis Mattf.) in Mountainous Watersheds (Central Greece)

Forests, Год журнала: 2025, Номер 16(5), С. 750 - 750

Опубликована: Апрель 27, 2025

Tree ring chronologies (tree width—TRW, earlywood—EW, latewood—LW) were constructed to investigate fir’s (Abies borisii-regis Mattf.) response key hydrometeorological factors, namely precipitation, temperature and drought (12-month Standardized Precipitation Evapotranspiration Index, SPEI-12). There has been only one previously published study conducted in the northern area of species’ expansion (Albania). The current was southern (Central Greece). most important factor that affected tree growth. May precipitation positively correlated with LW, while June July both EW LW. Previous September Interestingly, negatively EW. High temperatures April showed a positive relation high all chronologies, August related autumn previous year significantly (negatively) influenced chronologies. SPEI index revealed wet conditions during growth for affect LW formation. Wet also had effect on similar behavior showing is driving fir results highlight importance summer rainfall controlling Mediterranean regions. significant knowledge susceptibility Abies Mattf. climate variability highlighted its consequences future forest management plans.

Язык: Английский

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Reconstructing Hydroclimatic Variability (1657 AD) Using Tree-Ring Time Series and Observed and Gridded Precipitation Data in Central Greece

Forests, Год журнала: 2025, Номер 16(5), С. 773 - 773

Опубликована: Май 1, 2025

This study evaluated the long-term hydroclimatic trend through a reconstruction procedure of precipitation variability in central Greece (1657–2020), using eight tree-ring chronologies (Pinus sp. and Abies sp.). Through combination gridded climate datasets with width (TRW) earlywood (EWW) chronologies, we created three reconstructions, (1) April–August (AMJJA) (2) May–June (MJ) TRW (3) EWW utilizing both measured data. Chronologies were standardized ARSTAN, while principal component analysis (PCA) was used for development reconstructions. Verification calibration derived time series (split-period tests, RE > 0, R = 0.62–0.67) confirmed strong that explained 15%–45% precipitation. The results revealed growth–precipitation relationships throughout spring–summer (AMJJA/MJ). Multi-decadal is captured by higher-frequency signals are reflected EWW. Significant intervals (19.6-, 12.5-, 2.2-year cycles) found spectral analysis, indicating climatic impacts on chronologies. Extremely wet (e.g., 1885, 1913) dry 1894–1895) episodes against regional paleoclimate data consistent among previous reconstructions (72%–92% agreement). Despite fact sample depth reduced after 1978, EPS constantly higher than threshold (EPS 0.85 post-1746), showing reliability reconstruction. expanded record southeast Mediterranean highlighted reliable variables to predict historical

Язык: Английский

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Hydroclimatic Trends and Drought Risk Assessment in the Ceyhan River Basin: Insights from SPI and STI Indices

Hydrology, Год журнала: 2023, Номер 10(8), С. 157 - 157

Опубликована: Июль 26, 2023

This study examined the spatiotemporal climate variability over Ceyhan River basin in Southern Anatolia, Türkiye using historical rainfall and temperature observations recorded at 15 meteorology stations. Various statistical geostatistical techniques were employed to determine significance of trends for each climatic variable whole its three sub-regions (northern, central, southern regions). The results revealed that recent years generally warmer compared with previous years, a increase approximately 4 °C. standardized index analysis indicated shift towards hotter periods after 2005, while coldest observed early 1990s. spatial distribution showed non-uniform patterns throughout basin. first decade period (1975–1984) was characterized by relatively cold temperatures, followed transition from hot between 1985 2004, last (2005–2014). decreasing trend annual rainfall, particularly northern central regions However, region an increasing during period. exhibited considerable across basin, different experiencing distinct patterns. precipitation occurrence multiple drought events most severe prolonged droughts 1992–1996 2007–2010. These had significant impacts on water availability agricultural productivity

Язык: Английский

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The status quo effect in the sociohydrology of floods

Hydrological Sciences Journal, Год журнала: 2024, Номер unknown, С. 1 - 13

Опубликована: Окт. 30, 2024

Two behavioural types in sociohydrology of floods have been described more detail than others: the levee effect and learning effect. However, additional behaviour operate need further research. Taking case frequent flash occurring an ephemeral stream, a tributary Vilama River, located San Pedro de Atacama, Chile, at interphase between Atacama desert Andean Altiplano, we explore existence four neighbourhoods along tributary. Fieldwork to reconstruct recent flood event, hydrological analysis semistructured interviews with key informants characterize people's responses were conducted. Results show evidence that so-called status quo is present riparian community scale, i.e. when communities do not learn adapt prevent damage even exposed floods. Possible causes are discussed.

Язык: Английский

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