english:

 

 

                                 

 

                         TABLE 3-1.

       SUMMARY OF SUGGESTED PROCEDURES FOR ESTIMATING

              INITIAL LATERAL DIMENSIONS σyo AND

INITIAL VERTICAL DIMENSIONS σzo FOR VOLUME AND LINE SOURCES

Type of Source

Procedure for Obtaining

Initial Dimension

(a)  Initial Lateral Dimensions (σyo)

Single Volume Source

σyo =length of side divided by 4.3

Line Source Represented by Adjacent Volume Sources (see Figure 1‑8(a) in Volume II)

σyo =length of side divided by 2.15

Line Source Represented by Separated Volume Sources (see Figure 1‑8(b) in Volume II)

 

σyo =center to center distance divided by 2.15

(b)  Initial Vertical Dimensions (σzo)

Surface-Based Source (he ~ 0)

σzo =vertical dimension of source divided by 2.15

Elevated Source (he > 0) on or Adjacent to a Building

σzo =building height divided by 2.15

Elevated Source (he > 0) not on or Adjacent to a Building

σzo =vertical dimension of source divided by 4.3

3.3.2.3 AREA Source Inputs

     The ISC AREA source algorithms are used to model low level or ground level releases with no plume rise (e.g., storage piles, slag dumps, and lagoons).  The ISC models use a numerical integration approach for modeling impacts from area sources.  The ISC models accept rectangular areas that may also have a rotation angle specified relative to a north-south orientation.  The rotation angle is specified relative to the vertex used to define the source location on the SO LOCATION card (e.g., the southwest corner).  The syntax, type and order for the SRCPARAM card for AREA sources are summarized below:

Syntax:

SO SRCPARAM  Srcid Aremis Relhgt Xinit (Yinit) (Angle) (Szinit)

Type:

Mandatory, Repeatable

Order:

Must follow the LOCATION card for each source input

 

151 - 152 - 153 - 154 - 155 - 156 - 157 - 158 - 159 - 160 - 161 - 162 - 163 - 164 - 165 - 166 - 167 - 168 - 169 - 170 - 171 - 172 - 173 - 174 - 175 - 176 - 177 - 178 - 179 - 180 - 181 - 182 - 183 - 184 - 185 - 186 - 187 - 188 - 189 - 190 - 191 - 192 - 193 - 194 - 195 - 196 - 197 - 198 - 199 - 200

 

 

 

 

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