Review status: this preprint was under review for the journal ACP but the revision was not accepted.
On the Use of Measurements from a Commercial Microwave Link for Evaluation of Flash Floods in Arid Regions
Adam Eshel1,Hagit Messer2,Jonatan Ostrometzky2,Roi Raich2,Pinhas Alpert1,and Jonathan B. Laronne3Adam Eshel et al.Adam Eshel1,Hagit Messer2,Jonatan Ostrometzky2,Roi Raich2,Pinhas Alpert1,and Jonathan B. Laronne3
Received: 15 Oct 2017 – Accepted for review: 28 Nov 2017 – Discussion started: 06 Dec 2017
Abstract. Flash flood warning in deserts is a challenging task, and local rain bursts are of high significance. In the last decade, commercial microwave telecommunication links have been shown to be a valuable tool for near ground rainfall estimations. Dense networks are used for highly accurate rainfall estimates, while isolated links, typical in rural areas, can detect the existence of near-ground rainfall. However, the induced attenuation of the signal integrates the rainfall along a line, therefore high local rain intensities are smoothed. In this paper, we propose a novel method that uses the integration of measurements from an isolated long microwave link with measurements from weather radar to identify potential conditions for flash floods. In particular, we suggest using radar measurements to indicate the rain variability (spottiness) along a 16 km long link, crossing Wadi Ze'elim catchment (245 km2), using kurtosis as a spottiness index. Quantitative ground level rainfall measurements are then provided by the link. When compared with analyzed discharge, inverse kurtosis-rain rate relation is associated with flash flood responses in Wadi Ze'elim, an ephemeral Wadi located in the Dead Sea.
How to cite. Eshel, A., Messer, H., Ostrometzky, J., Raich, R., Alpert, P., and Laronne, J. B.: On the Use of Measurements from a Commercial Microwave Link for Evaluation of Flash Floods in Arid Regions, Atmos. Chem. Phys. Discuss. [preprint], https://doi.org/10.5194/acp-2017-963, 2017.
The power of a signal between two telecommunication (cellular) towers weakens when rain falls in the medium. Through which, accurate rain intensity at ground level in remote areas can be derived. This unique database, together with weather radar data was used to show the feasibility of its integration into short-term flash flood warning in arid areas, a challenging task using traditional means. Commercial towers are widely spread sensors and were therefore used opportunistically.
The power of a signal between two telecommunication (cellular) towers weakens when rain falls...