2016, 비점오염저감시설의 설치 및 관리운영 매뉴얼, 환경부

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2016, 비점오염저감시설의 설치 및 관리운영 매뉴얼, 환경부

매닝조도계수

매닝조도계수 [Manning粗度係數, Manning’s roughness coefficient]
수로의 벽면의 거칠기 성질에 의해 결정되는 계수

상세설명
흐름이 있는 경계면의 거친 정도를 나타내는 계수로, 수로를 구성하고 있는 면의 성질에 의해 결정된다.

여기서, v는 유속(m/sec), n은 매닝조도계수(coefficient of roughness)이며, n값은 0.009~0.014 까지 다양하게 분포되어 있다. R은 동수반경, I는 동수경사이다.

SWMM 5 Warning Messages

SWMM 5 Warning Messages

WARNING 01:

wet weather time step reduced to recording interval for Rain Gage xxx.

The wet weather time step was automatically reduced so that no period with rainfall would be skipped during a simulation.

WARNING 02:

maximum depth increased for Node xxx.

The maximum depth for the node was automatically increased to match the top of the highest connecting conduit.

WARNING 03:

negative offset ignored for Link xxx.

The link's stipulated offset was below the connecting node's invert so its actual offset was set to 0.

WARNING 04:

minimum elevation drop used for Conduit xxx.

The elevation drop between the end nodes of the conduit was below 0.001 ft (0.00035 m) so the latter value was used instead to calculate its slope.

WARNING 05:

minimum slope used for Conduit xxx.

The conduit's computed slope was below the user-specified Minimum Conduit Slope so the latter value was used instead.

WARNING 06:

dry weather time step increased to wet weather time step.

The user-specified time step for computing runoff during dry weather periods was lower than that set for wet weather periods and was automatically increased to the wet weather value.

WARNING 07:

routing time step reduced to wet weather time step.

The user-specified time step for flow routing was larger than the wet weather runoff time step and was automatically reduced to the runoff time step to prevent loss of accuracy.

WARNING 08:

elevation drop exceeds length for Conduit xxx.

The elevation drop across the ends of a conduit exceeds its length. The program computes the conduit's slope as the elevation drop divided by the length instead of using the more accurate right triangle method. The user should check for errors in the length and in both the invert elevations and offsets at the conduit's upstream and downstream nodes.

WARNING 09:

time series interval greater than recording interval for Rain Gage xxx.

The smallest time interval between entries in the precipitation time series used by the rain gage is greater than the recording time interval specified for the gage. If this was not actually intended then what appear to be continuous periods of rainfall in the time series will instead be read with time gaps in between them.

WARNING 10:

crest elevation is below downstream invert for regulator Link xxx.

The height of the opening on an orifice, weir, or outlet is below the invert elevation of its downstream node. Users should check to see if the regulator's offset height or the downstream node's invert elevation is in error.

WARNING 11:

non-matching attributes in Control Rule xxx.

A control rule's premise is comparing two different types of attributes to one another (for example, conduit flow and junction water depth). 

SWMM 5 Error Messages - File Errors

SWMM 5 Error Messages - File Errors

ERROR 301:

files share same names.

The input, report, and binary output files specified on the command line cannot have the same names.

ERROR 303:

cannot open input file.

The input file either does not exist or cannot be opened (e.g., it might be in use by another program).

ERROR 305:

cannot open report file.

The report file cannot be opened (e.g., it might reside in a directory to which the user does not have write privileges).

ERROR 307:

cannot open binary results file.

The binary output file cannot be opened (e.g., it might reside in a directory to which the user does not have write privileges).

ERROR 309:

error writing to binary results file.

There was an error in trying to write results to the binary output file (e.g., the disk might be full or the file size exceed the limit imposed by the operating system).

ERROR 311:

error reading from binary results file.

The command line version of SWMM could not read results saved to the binary output file when writing results to the report file.

ERROR 313:

cannot open scratch rainfall interface file.

SWMM could not open the temporary file it uses to collate data together from external rainfall files.

ERROR 315:

cannot open rainfall interface file xxx.

SWMM could not open the specified rainfall interface file, possibly because it does not exist or because the user does not have write privileges to its directory.

ERROR 317:

cannot open rainfall data file xxx.

An external rainfall data file could not be opened, most likely because it does not exist.

ERROR 318:

date out of sequence in rainfall data file xxx.

An external user-prepared rainfall data file must have its entries appear in chronological order. The first out-of-order entry will be listed.

ERROR 319:

unknown format for rainfall data file.

SWMM could not recognize the format used for a designated rainfall data file.

ERROR 320:        invalid format for rainfall interface file.

SWMM was trying to read data from a designated rainfall interface file with the wrong format (i.e., it may have been created for some other project or actually be some other type of file).

ERROR 321:

no data in rainfall interface file for gage xxx.

This message occurs when a project wants to use a previously saved rainfall interface file, but cannot find any data for one of its rain gages in the interface file. It can also occur if the gage uses data from a user-prepared rainfall file and the station id entered for the gage cannot be found in the file.

ERROR 323:

cannot open runoff interface file xxx.

A runoff interface file could not be opened, possibly because it does not exist or because the user does not have write privileges to its directory.

ERROR 325:

incompatible data found in runoff interface file.

SWMM was trying to read data from a designated runoff interface file with the wrong format (i.e., it may have been created for some other project or actually be some other type of file).

ERROR 327:

attempting to read beyond end of runoff interface file.

This error can occur when a previously saved runoff interface file is being used in a simulation with a longer duration than the one that created the interface file.

ERROR 329:

error in reading from runoff interface file.

A format error was encountered while trying to read data from a previously saved runoff interface file.

ERROR 331:

cannot open hot start interface file xxx.

A hotstart interface file could not be opened, possibly because it does not exist or because the user does not have write privileges to its directory.

ERROR 333:

incompatible data found in hot start interface file.

SWMM was trying to read data from a designated hotstart interface file with the wrong format (i.e., it may have been created for some other project or actually be some other type of file).

ERROR 335:

error in reading from hot start interface file.

A format error was encountered while trying to read data from a previously saved hotstart interface file.

ERROR 336:

no climate file specified for evaporation and/or wind speed.

This error occurs when the user specifies that evaporation or wind speed data will be read from an external climate file, but no name is supplied for the file.

ERROR 337:

cannot open climate file xxx.

An external climate data file could not be opened, most likely because it does not exist.

ERROR 338:

error in reading from climate file xxx.

SWMM was trying to read data from an external climate file with the wrong format.

ERROR 339:

attempt to read beyond end of climate file xxx.

The specified external climate does not include data for the period of time being simulated.

ERROR 341:

cannot open scratch RDII interface file.

SWMM could not open the temporary file it uses to store RDII flow data.

ERROR 343:

cannot open RDII interface file xxx.

An RDII interface file could not be opened, possibly because it does not exist or because the user does not have write privileges to its directory.

ERROR 345:

invalid format for RDII interface file.

SWMM was trying to read data from a designated RDII interface file with the wrong format (i.e., it may have been created for some other project or actually be some other type of file).

ERROR 351:

cannot open routing interface file xxx.

A routing interface file could not be opened, possibly because it does not exist or because the user does not have write privileges to its directory.

ERROR 353:

invalid format for routing interface file xxx.

SWMM was trying to read data from a designated routing interface file with the wrong format (i.e., it may have been created for some other project or actually be some other type of file).

ERROR 355:

mis-matched names in routing interface file xxx.

The names of pollutants found in a designated routing interface file do not match the names used in the current project.

ERROR 357:

inflows and outflows interface files have same name.

In cases where a run uses one routing interface file to provide inflows for a set of locations and another to save outflow results, the two files cannot both have the same name.

ERROR 361:

could not open external file used for Time Series xxx.

The external file used to provide data for the named time series could not be opened, most likely because it does not exist.

ERROR 363:

invalid data in external file used for used for Time Series xxx.

The external file used to provide data for the named time series has one or more lines with the wrong format.

SWMM 5 Error Messages - Format Errors

SWMM 5 Error Messages - Format Errors

ERROR 200:

one or more errors in input file.

This message appears when one or more input file parsing errors (the 200-series errors) occur.

ERROR 201:

too many characters in input line.

A line in the input file cannot exceed 1024 characters.

ERROR 203:

too few items at line n of input file.

Not enough data items were supplied on a line of the input file.

ERROR 205:

invalid keyword at line n of input file.

An unrecognized keyword was encountered when parsing a line of the input file.

ERROR 207:

duplicate ID name at line n of input file.

An ID name used for an object was already assigned to an object of the same category.

ERROR 209:

undefined object xxx at line n of input file.

A reference was made to an object that was never defined. An example would be if node 123 were designated as the outlet point of a subcatchment, yet no such node was ever defined in the study area.

ERROR 211:

invalid number xxx at line n of input file.

Either a string value was encountered where a numerical value was expected or an invalid number (e.g., a negative value) was supplied.

ERROR 213:

invalid date/time xxx at line n of input file.

An invalid format for a date or time was encountered. Dates must be entered as month/day/year and times as either decimal hours or as hour:minute:second.

ERROR 217:

control rule clause out of sequence at line n of input file.

Errors of this nature can occur when the format for writing control rules is not followed correctly (see Control Rule Format).

ERROR 219:

data provided for unidentified transect at line n of input file.

A GR line with Station-Elevation data was encountered in the [TRANSECTS] section of the input file after an NC line but before any X1 line that contains the transect's ID name.

ERROR 221:

transect station out of sequence at line n of input file.

The station distances specified for the transect of an irregular cross section must be in increasing numerical order starting from the left bank.

ERROR 223:

Transect xxx has too few stations.

A transect for an irregular cross section must have at least 2 stations defined for it.

ERROR 225:

Transect xxx has too many stations.

A transect cannot have more than 1500 stations defined for it.

ERROR 227:

Transect xxx has no Manning's N.

No Manning's N was specified for a transect (i.e., there was no NC line in the [TRANSECTS] section of the input file.

ERROR 229:

Transect xxx has invalid overbank locations.

The distance values specified for either the left or right overbank locations of a transect do not match any of the distances listed for the transect's stations.

ERROR 231:

Transect xxx has no depth.

All of the stations for a transect were assigned the same elevation.

ERROR 233:

invalid treatment function expression at line n of input file.

A treatment function supplied for a pollutant at a specific node is either not a correctly formed mathematical expression or refers to unknown pollutants, process variables, or math functions.

SWMM 5 Error Messages - Property Errors

SWMM 5 Error Messages - Property Errors

ERROR 108:

ambiguous outlet ID name for Subcatchment xxx.

The name of the element identified as the outlet of a subcatchment belongs to both a node and a subcatchment in the project's data base.

ERROR 109:

invalid parameter values for Aquifer xxx.

The properties entered for an aquifer object were either invalid numbers or were inconsistent with one another (e.g., the soil field capacity was higher than the porosity).

ERROR 110:

ground elevation is below water table for Subcatchment xxx.

The ground elevation assigned to a subcatchment's groundwater parameters cannot be below the initial water table elevation of the aquifer object used by the subcatchment.

ERROR 111:

invalid length for Conduit xxx.

Conduits cannot have zero or negative lengths.

ERROR 112:

elevation drop exceeds length for Conduit xxx.

The elevation drop across the ends of a conduit cannot be greater than the conduit's length. Check for errors in the length and in both the invert elevations and offsets at the conduit's upstream and downstream nodes.

ERROR 113:

invalid roughness for Conduit xxx.

Conduits cannot have zero or negative roughness values.

ERROR 114:

invalid number of barrels for Conduit xxx.

Conduits must consist of one or more barrels.

ERROR 115:

adverse slope for Conduit xxx.

Under Steady or Kinematic Wave routing, all conduits must have positive slopes.  This can usually be corrected by reversing the inlet and outlet nodes of the conduit (i.e., right click on the conduit and select Reverse from the popup menu that appears). Adverse slopes are permitted under Dynamic Wave routing.

ERROR 117:

no cross section defined for Link xxx.

A cross section geometry was never defined for the specified link.

ERROR 119:

invalid cross section for Link xxx.

Either an invalid shape or invalid set of dimensions was specified for a link's cross section.

ERROR 121:

missing or invalid pump curve assigned to Pump xxx.

Either no pump curve or an invalid type of curve was specified for a pump.

ERROR 131:

the following links form cyclic loops in the drainage system.

The Steady and Kinematic Wave flow routing methods cannot be applied to systems where a cyclic loop exists (i.e., a directed path along a set of links that begins and ends at the same node). Most often the cyclic nature of the loop can be eliminated by reversing the direction of one of its links (i.e., switching the inlet and outlet nodes of the link). The names of the links that form the loop will be listed following this message.

ERROR 133:

Node xxx has more than one outlet link.

Under Steady and Kinematic Wave flow routing, a junction node can have only a single outlet link.

ERROR 134:

Node xxx has illegal DUMMY link connections.

Only a single conduit with a DUMMY cross-section or Ideal-type pump can be directed out of a node; a node with an outgoing Dummy conduit or Ideal pump cannot have all of its incoming links be Dummy conduits and Ideal pumps; a Dummy conduit cannot have its upstream end connected to a storage node.

ERROR 135:

Divider xxx does not have two outlet links.

Flow divider nodes must have two outlet links connected to them.

ERROR 136:

Divider xxx has invalid diversion link.

The link specified as being the one carrying the diverted flow from a flow divider node was defined with a different inlet node.

ERROR 137:

Weir Divider xxx has invalid parameters.

The parameters of a Weir-type divider node either are non-positive numbers or are inconsistent (i.e., the value of the discharge coefficient times the weir height raised to the 3/2 power must be greater than the minimum flow parameter).

ERROR 138:

Node xxx has initial depth greater than maximum depth.

Self-explanatory.

ERROR 139:

Regulator xxx is the outlet of a non-storage node.

Under Steady or Kinematic Wave flow routing, orifices, weirs, and outlet links can only be used as outflow links from storage nodes.

ERROR 141:

Outfall xxx has more than 1 inlet link or an outlet link.

An outfall node is only permitted to have one link attached to it.

ERROR 143:

Regulator xxx has invalid cross-section shape.

An orifice must have either a CIRCULAR or RECT_CLOSED shape, while a weir must have either a RECT_OPEN, TRAPEZOIDAL, or TRIANGULAR shape.

ERROR 145:

Drainage system has no acceptable outlet nodes.

Under Dynamic Wave flow routing, there must be at least one node designated as an outfall.

ERROR 151:

a Unit Hydrograph in set xxx has invalid time base.

The time base of a Unit Hydrograph cannot be negative and if positive, must not be less than the recording interval for its rain gage.

ERROR 153:

a Unit Hydrograph in set xxx has invalid response ratios.

The response ratios for a set of Unit Hydrographs (the short-, medium-, and long-term response hydrographs) must be between 0 and 1.0 and cannot add up to a value greater than 1.0

ERROR 155:

invalid sewer area for RDII at Node xxx.

The sewer area contributing RDII inflow to a node cannot be a negative number.

ERROR 156:

inconsistent data file name for Rain Gage xxx.

If two Rain Gages use files for their data sources and have the same Station IDs then they must also use the same data files.

ERROR 157:

inconsistent rainfall format for Rain Gage xxx.

If two or more rain gages use the same Time Series for their rainfall data then they must all use the same data format (intensity, volume, or cumulative volume).

ERROR 158:

time series for Rain Gage xxx is also used by another object.

A rainfall Time Series associated with a Rain Gage cannot be used by another object that is not also a Rain Gage.

ERROR 159:

recording interval greater than time series interval for Rain Gage xxx.

The recording time interval specified for the rain gage is greater than the smallest time interval between values in the Time Series used by the gage.

ERROR 161:

cyclic dependency in treatment functions at Node xxx.

An example would be where the removal of pollutant 1 is defined as a function of the removal of pollutant 2 while the removal of pollutant 2 is defined as a function of the removal of pollutant 1.

ERROR 171:

Curve xxx has its data out of sequence.

The X-values of a curve object must be entered in increasing order.

ERROR 173:

Time Series xxx has its data out of sequence.

The time (or date/time) values of a time series must be entered in sequential order.

ERROR 181:

invalid Snow Melt Climatology parameters.

The ATI Weight or Negative Melt Ratio parameters are not between 0 and 1 or the site latitude is not between -60 and +60 degrees.

ERROR 182:

invalid parameters for Snow Pack xxx.

A snow pack's minimum melt coefficient is greater than its maximum coefficient; the fractions of free water capacity or impervious plowable area are not between 0 and 1; or the snow removal fractions sum to more than 1.0.

ERROR 183:

no type specified for LID xxx.

A named LID control has layers defined for it but its LID type was never specified.

ERROR 184:

missing layer for LID xxx.

A required design layer is missing for the specified LID control.

ERROR 185:

invalid parameter value for LID xxx.

An invalid value was supplied for an LID control's design parameter.

ERROR 187:

LID area exceeds total area for Subcatchment xxx.

The area of the LID controls placed within the subcatchment is greater than that of the subcatchment itself.

ERROR 188:

LID capture area exceeds total impervious area for Subcatchment xxx.

The amount of impervious area assigned to be treated by LID controls in the subcatchment exceeds the total amount of impervious area available.

ERROR 191:

simulation start date comes after ending date.

Self-explanatory.

ERROR 193:

report start date comes after ending date.

Self-explanatory.

ERROR 195:

reporting time step is less than routing time step.

Self-explanatory.

SWMM 5 Error Messages - Run Time Errors

SWMM 5 Error Messages - Run Time Errors

ERROR 101:

memory allocation error.

There is not enough physical memory in the computer 

to analyze the study area.

ERROR 103:

cannot solve KW equations for Link xxx.

The internal solver for Kinematic Wave routing failed to converge 

for the specified link at some stage of the simulation.

ERROR 105:

cannot open ODE solver.

The system could not open its Ordinary Differential Equation solver.

ERROR 107:

cannot compute a valid time step.

A valid time step for runoff or flow routing calculations 

(i.e., a number greater than 0) could not be computed 

at some stage of the simulation.

지리정보를 이용한 수문분석 및 수질예측을 위한 용어사전 – CN

유출곡선지수(流出曲線指數, runoff curve number, CN)

여러 유역의 자료로부터 총우량과 유호우량을 도시한 결과 여러 가지의 곡선이 있음을 알아내고 이 곡선을 표준화여 0에서 100사이의 값을 가지는 무차원 유출곡선지수 CN을 개발했다. 불투수 또는 수표면에서는 CN=100이고, 자연적인 지표면에서는 CN<100이다.

지리정보를 이용한 수문분석 및 수질예측을 위한 용어사전 – CSO / SSO

CSOs(Combined Sewer Overflows, 합류식하수도월류수 / 합류식하수관거월류수)

합류식하수도에서 우천 시에 처리용량을 초과하는 빗물이 유입되어 하수(빗물+오수)의 일부가 처리되지 않은 상태로 하천에 방류되는 것

SSOs(Sanitary Sewer Overflows, 분류식하수도 월류수)

분류식하수도에서 오수관로나 맨홀로 불명수가 유입되어 하수처리장에서 처리되지 못하고 하천에 방류되는 것

엑셀 백분위수에 해당하는 값 구하기

엑셀 백분위수에 해당하는 값 구하기

출처 : http://mainia.tistory.com/2343

지리정보를 이용한 수문분석 및 수질예측을 위한 용어사전 - 강우지속기간

강우지속기간
[降雨持續期間, duration of rainfall]

요약
비가 내리기 시작하여 끝날 때까지의 시간으로 강우량의 누가곡선에서 강우가 지속된 시간

상세설명
비가 내린 시간을 말하며, 실제 현장에서의 측정자료는 강우 중에도 짧은 시간 동안 간헐적으로 비가 멈추는 시간이 있으므로 엄밀한 의미로 강우지속시간을 결정지어 구분하기는 어렵다. 실제 분석에서는 강우량 누가곡선에서 강우가 계속되었을 것으로 판단되는 시간으로 구한다. 강우강도식으로부터 강우강도를 산정할 때 필요하며, 10분, 30분, 1시간, 24시간 등으로 나타낸다. 일반적으로 분단위 또는 시간 단위로 측정한다.

지리정보를 이용한 수문분석 및 수질예측을 위한 용어사전 - 재현기간

재현기간
[再現期間, recurrence interval, return period]

설명

특정규모이상의 홍수, 가뭄 등의 현상이 반복해서 나타나는데 걸리는 평균시간.

지리정보를 이용한 수문분석 및 수질예측을 위한 용어사전 - 유역(流域)

유역
[流域, basin / watershed]

요약

하나의 하천에 강수가 유입되는 전 구역을 말하며, 집수역이라고도 함

상세설명

강우 시 하천으로 물이 모여드는 주변 지역을 의미하며, 한 유역에 내리는 강우는 유역에서 가장 낮은 지점으로 모이게 된다. 집수구역이라고도 하며, 대부분이 산지로 둘러 싸여진 부분은 유역 결정이 뚜렷한 반면, 평지에서는 유역이 불분명한 경우가 많다. 예를 들어 낙동강 유역이라 하면, 빗물이 지면에 떨어진 후 빗물이 흐를 때 본류는 물론 지류까지 모두 포함하여 낙동강 쪽으로 물이 흘러내리는 모든 지역을 의미한다. 서로 이웃한 유역은 인공적으로 연결되어 위급 시 서로 물을 주고받을 수 있도록 설치된 곳도 있다. 한편, 지하수의 경우 지상하천과 관련된 유역면적과 지하수가 흘러드는 범위가 반드시 일치하지 않는 경우가 있다.

basin : (큰 강의) 유역, a large or deep bowl that you use for holding liquids

watershed : (분수계, 즉 강물이 갈라지는 경계가 되는) 분수령, 유역, an area or ridge of land that separates waters flowing to different rivers, basins, or seas.


https://www.water.or.kr/images/egovframework/knowledge/wordimg/img30159.jpg

지리정보를 이용한 수문분석 및 수질예측을 위한 용어사전 - 저영향개발(LID)

저영향개발
[低影響開發, Low-impact development(LID)]

요약

강우유출 발생지에서부터 침투, 저류를 통해 도시화에 따른 수생태계를 최소화하여 개발 이전의 상태에 최대한 가깝게 만들기 위한 토지이용 계획 및 도시 개발 기법


상세설명

강우유출 발생지에서부터 침투, 저류를 통해 도시화에 따른 수생태계를 최소화하여 개발 이전의 상태에 최대한 가깝게 만들기 위한 토지이용 계획 및 도시 개발 기법을 말한다. 개발 이전 상태와 크게 다르지 않게 수문학적 저류기능이 복원되도록 소규모의 자연적인 저류, 체류, 방지, 처리 기술을 적용하는 것이다. 또한, LID는 물과 관련된 생태적 기능을 보존하면서 개발을 가능하도록 하는 강력한 기술로서 개발지역에 새로운 설계 원리의 소규모 관리 시설에 적용할 수 있으며, 친환경적 기능과 경관을 창출하여 오염을 방지하는 기능 및 생태계를 분리하지 않고 수용할 수 있는 기능들이 포함되어 있다


1990년대 후반에 미국에서 전형적인 친환경 우수관리 실천수단인 BMP's(Best Management Practices, 최적관리기법)를 기반으로 저영향 개발에 대한 개념을 확립하였으며, 최근 미국의 북서부를 중심으로 도시계획 차원에서 배수 시스템을 개선하는 방향으로 LID가 적극적으로 활용되고 있다. 세부 적용기준은 지역별로, 그 지역의 기후, 지형 등에 따라 달라지지만 공통적으로는 투수면적을 늘려, 유출수의 침투를 보다 많이 하여 홍수 및 정화기능을 강화하고, 친환경적인 배수환경을 조성하여 건강한 물순환체계를 구축하는 것을 목표로 한다.

출처 : 물백과사전, https://www.water.or.kr/

Useful Link of SWMM

1. https://swmm5.org/
Blogs about InfoSWMM, InfoSewer, InfoWorks ICM, The EPA Stormwater Management Model SWMM 5, alternate SWMM5's and (future) SWMM 6, a few Past SWMM 4 Posts and How to Understand and Calibrate Hydrology and Hydraulics Models
EPA STORMWATER MANAGEMENT MODEL (SWMM5) AND INFOSWMM INFORMATION FOR WATERSHED WATER QUALITY, HYDROLOGY AND HYDRAULICS MODELERS

2. https://www.openswmm.org/
Expand your knowledge of SWMM with the people who know it best: its users, developers and innovators.

3. http://swmm2000.com/
How to Use SWMM 5, SWMM 6, InfoSWMM for Water Quality, Hydrology, Hydraulics, RDII, LIDs, SuDs

비점오염저감시설의 규모 및 용량결정

비점오염저감시설의 규모 및 용량결정

배수구역의 누적유출고로 환산하여 최소 5mm 이상의 강우량을 처리할 수 있는 규모에 합치하게 설계강우량을 설정하여야 한다.

기준이 되는 규모의 결정은 다음의 방법에 따른다.
WQv = P1×A×10-3
WQv : 수질처리용량(Water Quality Volume),(m3)
P1 : 설계강우량으로부터 환산된 누적유출고(mm)

A : 배수면적(m2)

P1(누적유출고)=P×Rv로
여기서, P = 설계강우량,
Rv = 유출계수(0.05+0.009×I, I = 불투수율(%))

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강우유출수를 연속하여 처리하는 시설인 장치형 시설과 자연형 시설 중 식생여과대 및 식생수로 등은 수질처리유량(WQF, m3/h)으로 설계가 이루어지므로 시설별 특성에 부합하는 용량설계기준을 적용하여 설계하는 것이 좋다.

WQF = C×I×A×10-3
WQF : 수질처리유량(Water Quality Flow),(m3/h)
C : 처리대상구역의 유출계수
I : 기준강우강도(mm/h)
A : 처리대상구역의 면적(m2)

엑셀에서 인쇄 페이지 나누기

엑셀에서 인쇄 페이지 나누기

http://jaykim361.tistory.com/807

Storm Water Management Model (SWMM) download

SWMM ; Application that helps predict the quantity and quality of runoff within urban areas.

Download SWMM here : https://www.epa.gov/water-research/storm-water-management-model-swmm

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 SWMM : 도시 지역에서  유출수의 유량 및 수질을 예측하는데 도움을 주는 응용프로그램입니다.

여기에서 SWMM 을 다운로드하세요  : https://www.epa.gov/water-research/storm-water-management-model-swmm

Description of blog

A blog about Assessment of LID(Low Impact Development) with Hydrology and Water Quality Simulation with SWMM, SWAT based on GIS.

GIS기반의 SWMM, SWAT를 이용한 수문, 수질 모의와 함께 저영향개발(LID) 평가에 관한 정보를 다루는 블로그입니다.

Soil & Water Assessment Tool (SWAT) download

ArcSWAT is an ArcGIS-ArcView extension and interface for SWAT.

Download ArcSWAT here : https://swat.tamu.edu/software/arcswat/

ArcSWAT 는 ArcGIS-ArcView 확장프로그램으로 SWAT 를 위한 인터페이스입니다.

여기에서 ArcSWAT 를 다운로드하세요 : https://swat.tamu.edu/software/arcswat/

AutoCAD 도면 파일 확장자 설명

AutoCAD 도면 파일 확장자 설명

DST – 도면 세트 또는 시트 세트 파일(SHEETSET 명령)

DWF – 도면 웹 파일

DWFx – 도면 웹 파일

DWG – 도면 또는 블록 파일

DWS – 도면 표준 파일

DWT – 도면 템플릿 파일

DXB – 도면 교환 이진 파일

DXF – 도면 교환 파일, ASCII 또는 이진

SV$ – 자동 저장 도면 파일

http://help.autodesk.com/view/ACD/2016/KOR/?guid=GUID-0F71C933-8933-46E9-A73C-148EFB42D8B7

지리정보를 이용한 수문분석 및 수질예측을 위한 용어사전

지리정보를 이용한 수문분석 및 수질예측을 위한 용어사전

 

GIS, Geographic Information Systems, 지리정보시스템

TIN, Triangular Irregular Networks, 불규칙삼각망

DEM, Digital Elevation Model, 수치표고모형, 수치고도모형

grid, 격자무늬, 기준선망