the factors which influence the interception loss from vegetation

-


During precipitation even part of the rain is intercepted by leaves,stems,branches etc. of vegetation part or all of which is evaporated back into the atmosphere without participating in the land-bound portion of hydrological cycle.This is termed as interception loss.

Interception loss=gross precipitation - net rainfall

where,gross precipitation includes thoroughfall+stemflow

the actors affecting interception loss from vegetation are:-

1)interception loss is higher when rainfalls on dry vegetation because interception storage capacity is higher initially but it decreases as vegetation gets etter,so does interception loss.

2)The air near the ground may not be satuated even during the condensation & rain drop formation high in the atmosphere which may lead to evaporation from leaf surface although interception storage cpacity is filled.

3)Other conditions remaining constsnt,high wind speed will cause high evaporation & thus high interception loss during a long period of rainfall event.

4)The relative importance of interception loss will decrease as rainfall amount increases.

5)Type & morphology of the vegetation cover.Eg.-In most cases interception losses from the trees is greater than that from grasses.

6)Type of precipitation including size distribution of drops & especialy contrast between rain & snow.

Comments

Post a Comment

Popular posts from this blog

Distinguish between barotropic & baroclinic conditions of the atmosphere

-
An air mass which is defined as a large body of air whose physical properties especially temperature, moisture & lapse rate are more or less uniform horizontally for hundreds of kilometers.                             barotropic condition of atmosphere is theoretically ideal condition where surfaces of constant pressure are not intersected by isostereic(constant density) surfaces, so that in a vertical cross-section isobars(imaginary lines joining places of equal atmospheric pressure) & isotherms appear parallel i.e,zero baroclinicity.It is a rare phenomenon & is found in case of frontogenesis,separated by baroclinic front zone.          Baroclinic condition of atmosphere is seen in comparatively narrow zones (perhaps 1000Km. in width) of thermal discontinuity also known as fronts in air mass property. They are belts of sharp meteorological gradient recognized as distinct factors in the origin of mid-latitude disturbances. The instability is associated with rising wa
Read more

Airtel DTH: Error B001/Error B003 and Why I left Airtel possibly for Better

-
Image
Why did I decided to Leave?  It has been 2 weeks since I complained about B001 error and Airtel in between replaced 2 set top boxes but problem remained. I have replaced everything as per "diagnosis" of airtel DTH technician but no solution could be reached. Currently, my balance has been deducted from INR200 to INR 10. There are discrepancies with the bills issued against parts replacements conducted during this period. It must be stressed here that I as a customer felt cheated, neglected, harassed by Airtel +Service Partner and I was a 7-8 years+ customer. We never saw that set top box seals were broken in front of our eyes for both the replacements by technicians. My comparison chart for new service provider
Read more

Why do isotherms shift north & south from season to season?

-
An isotherm is an imaginary line drawn on a weather chart or map to join places of equal temperature. Temperature varies from season -as there is high temperature during summer & low temperature during winter with minor changes during transitionary seasons. We know that temperature is proportional to atmospheric pressure & inversely proportional to density.                                                        A.P.=K*D*T                                                           T=A.P*1/D where,A.P.=atmospheric pressure;K=constant;D=density;T=temperature      During the summer season in either of the hemisphere's the sun is vertically overhead of the tropic of cancer/capricorn.The land which has a low specific heat capacity & also being a bad conductor of heat re-radiates the heat to the atmosphere resulting in the spreading of molecules of atmospheric gases due to the heat energy. As molecules spread over a wide region it's pressure on the land becomes l
Read more