Orographic Precipitation Modeling with Multiple Linear Regression

Naoum, Sherif; Tsanis, Ioannis K.

doi:10.1061/(asce)1084-0699(2004)9:2(79)

Cited by 64 publications

(37 citation statements)

References 25 publications

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“…The mean elevation is 482 m ranging from sea level to 2450 m and the average slope 228 m km −1 with the topography fracturing into small catchments with ephemeral streams and karst geology. Crete has a typical Mediterranean island environment, with about 40 % of the annual precipitation occurring in the winter months while there is negligible rainfall during summer (Naoum and Tsanis, 2004;Koutroulis and Tsanis, 2010). An extensive analysis of the occurrence and seasonality of floods and their hydrometeorologic characteristics in the island of Crete is reported by Koutroulis et al (2010).…”

Section: Study Area and Datasetsmentioning

confidence: 99%

Lightning activity, rainfall and flash flooding – occasional or interrelated events? A case study in the island of Crete

Koutroulis

Grillakis

Tsanis

et al. 2012

Nat. Hazards Earth Syst. Sci.

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Abstract. The majority of cyclones passing over Crete in late autumn to early winter originate from southwest, west and northwest and are of varying size and intensity. A number of these cyclones cause flash floods. The present study reports the possible relationships between lighting activity and high precipitation related to flash flood events. In this study an attempt was made to correlate the lightning number and location, recorded by the ZEUS lightning detection system, with the rainfall characteristics for sixteen rain events (4 flood and 12 non-flood events) on the island of Crete, during the period [2008][2009]. Spatiotemporal analysis of rain and rain rate with flash count was performed with respect to distance (radius) of flashes from raingauge location at various temporal scales, in order to examine the correlation of accumulated rainfall and lightning activity. The maximum attained statistical significant correlation was obtained within a circular area of an average radius of 15 km around the raingauge, and an average time lag of flash count prior precipitation accumulation of 15 min. The maximum correlation between the lightning and rainfall data is obtained for shorter time lags for the flood events (15 min) than the non-flood events (25 min), that could reflect the faster propagation of flood triggering storms due to high convective activity. Results show increased lightning activity occurring during flood triggering storms, by an average of four times higher. Furthermore, there is evidence that the number of flashes that occur during a precipitation event is related to precipitation depth when the latter is adequate to produce a flood event. Differences between flood and non-flood producing storms need to be further assessed by analyzing more independent parameters, including the synoptic conditions and dominant flash flood hydrological generating processes.

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Section: Study Area and Datasetsmentioning

confidence: 99%

Lightning activity, rainfall and flash flooding – occasional or interrelated events? A case study in the island of Crete

Koutroulis

Grillakis

Tsanis

et al. 2012

Nat. Hazards Earth Syst. Sci.

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“…Multilinear-regression models were used to estimate the spatial distribution of precipitation over the catchment. The MLR models have previously been used for mountainous regions (e.g., Marquínez et al, 2003;Naoum and Tsanis, 2004;Um et al, 2010). Cumulative precipitation P and geographical position altitude Z, latitude X, and longitude Y of the stations were used as response and predictor variables, respectively.…”

Section: Resultsmentioning

confidence: 99%

A new method to estimate annual and event-based recharge coefficient in karst aquifers; case study: Sheshpeer karst aquifer, south-central Iran

Kavousi¹,

Raeisi²

2016

JCKS

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Quantification of recharge is a fundamental issue in evaluation and management of karst water resources. Recharge coefficient (RC), which is the ratio of aquifer recharged water (VR) to the total precipitation, has been widely used for recharge estimation in karst catchments. Though the RC definition is straightforward, in practice, its application on a fixed short time scale (e.g., monthly or annual) is challenging, because of the problems in determination of change in groundwater storage (DVS) that is included in VR. Some researchers have neglected DVS, estimated VR as equal to the net aquifer outflows; hence they have over-or under-estimated the RC, ignoring the aquifer's antecedent storage condition. In this study, a new method is proposed to estimate the actual event VR, and consequently, the event-based RC, utilizing the MRC displacement method of Kavousi and Raeisi (2015). Applying the method, VR due to a specific event or a combination of events during a hydrological year can be directly estimated by decomposition of the observed hydrograph to the individual hydrographs induced by different events. The method is applicable for karst aquifers with no-flow boundaries, draining by a spring. The calculated event VR takes DVS into account, enabling an accurate event-based RC estimation. The method was applied to the Sheshpeer karst aquifer in Iran. The estimated RCs reasonably matched up to the catchment properties and former field studies. Results showed that the annual RCs would be underestimated if the DVS was neglected, because DVS was positive during the study period.

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“…yöntemleri içeren nümerik metot çalışmaları da bulunmaktadır [4,5,6,7,8,9]. Topografik metotlar ise, bir bölgedeki nokta ölçümleri ile bu bölgeye ait yükseklik, eğim, bakı, rüzgar yönü ve hızı gibi bir takım coğrafik ve topoğrafik özelliklerin ilişkisini kapsamaktadır [1,10,11,12,13,14,15,16,17].…”

Section: Introductionunclassified

Ölçümleri Az Olan Kıyı Bölgelerinde Yağışın Yerel Dağılımının Belirlenmesi: Doğu Karadeniz Bölgesi

Eriş¹,

Ağıralioğlu²

2017

Teknik Dergi

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ÖZYağışın alandaki dağılımının belirlenmesi, hidrolojik uygulamaların ve su kaynaklarının doğru değerlendirilmesi açısından büyük önem taşır. Özellikle dağlık ve/veya kıyı bölgelerde hem orografiyi hem de kıyı etkilerini yağışın dağılımını belirlemede hesaba katmak gerekebilir. Bu gerekliliği, dağlık bölgelerde yağış gözlem istasyonlarının az ve düzensiz olması zorlaştırır. Bu çalışmada da, orografik yağış özelliği gösterdiği bilinen ve sınırlı sayıda yağış gözlem istasyonuna sahip Doğu Karadeniz Bölgesinin kıyı kesimi için yağış dağılımının belirlenmesi amaçlanmıştır. Çalışma, Doğu Karadeniz Bölgesinin kıyı kesimine ait yamaçlardaki yağış dağılımının temsilinde su dengesinin, kıyı ve vadilerdeki yağış dağılımının temsilinde ise regresyon denklemlerinin birleştirilerek kullanılması açısından bir ilktir.Anahtar Kelimeler: Yağış dağılımı, Doğu Karadeniz Bölgesi, eşyağış haritası. ABSTRACT Determination of Spatial Distribution of Precipitation on Poorly Gauged Coastal Regions: Eastern Black Sea RegionDetermination of spatial distribution of precipitation has an importance in terms of hydrological applications and water resources assessment. Particularly, the effects of orography and coastline on precipitation distribution should be taken into account in mountainous and/or coastal regions. This necessity is complicated by the limited number of rain gauges which have also a nonhomogenous distribution. In this study, it is aimed to determine the spatial distribution of precipitation for the coastal part of the Eastern Black Sea Region. It can be said that this study is the first in terms of combination of precipitation distribution on both hillside and coastal part by using two different approaches. One of these approaches is the water balance that reflects the precipitation distribution on hillside. The other one depends on the regression equations which explains the precipitation variability on coastline and valleys, for the coastal part of the Eastern Black Sea Region.

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Orographic Precipitation Modeling with Multiple Linear Regression

Cited by 64 publications

References 25 publications

Lightning activity, rainfall and flash flooding – occasional or interrelated events? A case study in the island of Crete

Lightning activity, rainfall and flash flooding – occasional or interrelated events? A case study in the island of Crete

A new method to estimate annual and event-based recharge coefficient in karst aquifers; case study: Sheshpeer karst aquifer, south-central Iran

Ölçümleri Az Olan Kıyı Bölgelerinde Yağışın Yerel Dağılımının Belirlenmesi: Doğu Karadeniz Bölgesi

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