INDUSTRIAL AREA BADDI DISTRICT SOLAN HIMACHAL PRADESH HAS BEEN DISCONNECTED FROM HIMACHAL PRADESH, CHANDIGARH AND PUNJAB & HARYANA DUE TO HEAVY RAIN ON 9AND 10-7-2023 .

During heavy rains the water current carry silt due to flood and is the result of erosion by water on the soil in the catchment area of river .The proportion of silt to water and the size of silt particles carried depends upon the nature of the surface soil ,it's slope and the intensity of rainfall in the area of the catchment.Silt carrying capacity of the water depends on the discharge, surface slope,grade of silt and the silt charge .The water in the main stream carries silt with a high silt factor which must be analysed where found necessary.There are two classes of silts (1) bed silt ,which is dragged or rolled along the bed ,and suspended silt .The heavier the particles the closer to the bed it remains , depending upon the velocity,Silt that may be suspended in a bigger way out of the discharge and on account of its high velocity may start rolling into the layers or even be dropped in the bed .A non silting velocity is the velocity at which a section of water going is just able to carry it's silt load without dropping any of it in the bed .The silt during summer is muddy and it becomes fine and course sand in winter .The silt charge by weight is maximum in rainy season when the parent river is in floods .The amount of silt suspended in various layers is different.It is about 60 to 70 percent by weight near the surface and about thirty percent near the bed .At a depth of about 0.6 D from the surface where the mean velocity occurs , the quantity of silt suspended for silt -charge intensity presents a fair average of the total quantity of silt .