Disdrometer

About: Disdrometer is a research topic. Over the lifetime, 930 publications have been published within this topic receiving 23092 citations.

Rain-induced erosion: a study in badlands national park

Abstract: Factors that may influence the severity of erosion at a given location include soil composition, annual rainfall, climate, and vegetation type and coverage. This study addresses the ongoing erosion occurring in the Badlands National Park (BNP) in South Dakota. The research work is aimed to determine a better measurement of the rain erosion in the BNP using a laser optical disdrometer and erosion scales. A Parsivel disdrometer instrument was installed during May-September, 2011, to measure raindrop sizes and their fall velocities. Using these variables, we calculated the rainfall intensities and kinetic energy fluxes of individual rain events, the main parameters needed to estimate the rain in duced erosion rate. Rain events were categorized as light, moderate, and heavy based on rainfall intensity, as well as either convective or stratiform based on radar data. Heavy events that also produced hail were considered an additional category. Comparisons between kinetic energy fluxes associated with hail- and non-hail producing events showed a clear separation: an average of 1574 J/m 2

Estimating Rain Microphysical Characteristics Using S-Band Dual-Polarization Radar in South Korea

Abstract: Raindrop size distribution (DSD) observed using a disdrometer can be represented by a constrained-gamma (C-G) DSD model based on the empirical relationship between shape (μ) and slope (Λ). ...

Application of an optical disdrometer to characterize simulated rainfall and measure drop-size distribution

Abstract: Knowledge of rainfall characteristics such as drop-size distribution is essential for the development of erosion-mitigation strategies and models This research used an optical disdrometer to eluci

Rain drop size distribution analysis at a tropical location near land-sea boundary

Abstract: Rain events can be characterized by rain drop size distribution (DSD) that denotes the number of drops as a function of diameter per unit size interval and per unit volume of space. DSD (at ground level) describes the microstructure of precipitation during different phases of rain varying both spatially and temporally. DSD can be influenced by the nature and origin of rain. The present study investigates the role of continental and maritime airflow in influencing the precipitation features near the land-sea boundary. The data of the rain DSD used in the present analysis are collected from a ground-based disdrometer located at Kolkata, India, near land-sea boundary during the year of 2011–2017. The dataset is divided into two categories, namely, maritime and continental rainfall, based on the airflow trajectories associated with rain events exclusively from Bay of Bengal or land region in the west of Kolkata as derived from TRAJSTAT software. The events with trajectories extending both over land and sea region are excluded for the present study. Variations of the DSD parameters using the gamma model are presented showing the abundance of smaller drops during maritime rain events whereas dominance of larger rain drops in the case of the continental rain events. The Z-R relations are also found to be significantly different for these two types of rain. The present study reveals the microstructures of rain at a location where the influences of both land and sea climatic features prevail.