Acre (IMAC, 2010) |
Water balance.
Reference flow rate calculations are obtained by using historical series.
Maximum allowable flow rate in the course of interest.
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Alagoas (SEMARH, 2001SECRETARIA DE ESTADO DO MEIO AMBIENTE E RECURSOS HÍDRICOS - SEMARH. Decreto nº 6, 23 de janeiro de 2001.) |
Guaranteed regulated annual discharge of 90%.
The sum of the volumes of water granted in a basin cannot exceed nine-tenths of the annual regulated flow.
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Amapá (IMAP, 2017INSTITUTO DE MEIO AMBIENTE E ORDENAMENTO TERRITORIAL DO AMAPÁ - IMAP. Resoluções IMAP nº 008 e 009, 2017.) |
Local water balance.
Calculation of reference flows.
Maximum flow needed in the river area of interest.
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Amazonas (IPAAM, 2016INSTITUTO DE PROTEÇÃO AMBIENTAL DO AMAZONAS IPAAM. Resoluções CERH-AM nº 01 e 02 e Portaria normativa/SEMA/IPAAM nº 01, 2016.) |
Guaranteed flow rate of 95% by volume, either equal to or higher.
When there is a lack of information, the lowest local measured flow in the dry season is adopted. Outside the dry season a reduction coefficient is used.
The sum of the maximum flows cannot exceed 75% of the 95% guaranteed reference flow rate.
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Bahia (INEMA, 2014INSTITUTO DO MEIO AMBIENTE E RECURSOS HÍDRICOS - INEMA. Resolução CONERH nº 96, 2014.) |
Sum of maximum flows may not exceed 80% of the 90% of the guaranteed reference flow rate.
Individual usage may not exceed 20% of the 90% of the guaranteed reference flow rate.
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Distrito Federal (ADASA, 2001AGÊNCIA REGULADORA DE ÁGUA, ENERGIA E SANEAMENTO BÁSICO DO DISTRITO FEDERAL - ADASA. Decreto nº 22358, 22359 de 2001, resolução ADASA nº 350, 2001.) |
Depending on the region, Q7,10 or Q90 is adopted, and the sum of the flows cannot exceed 80% of the guaranteed flows. |
Espírito Santo (AGERH, 2005AGÊNCIA ESTADUAL DE RECURSOS HÍDRICOS - AGERH. Resolução normativa do CERH nº 5, 2005.) |
Reference flow rate should be less than, or equal to Q7,10, and cannot exceed the watercourse's dry period flow rate. |
Goiás (SECIMA, 2005SECRETARIA DO MEIO AMBIENTE, RECURSOS HÍDRICOS, INFRAESTRUTURA, CIDADES E ASSUNTOS METROPOLITANOS DO ESTADO DE GOIÁS - SECIMA. Resolução CERH nº 09 e Instrução Normativa no 12, 2005.) |
The sum of the flows cannot exceed 70% of the guaranteed reference flow rate of 90%. Conservative methodologies of 50% of the reference flow rate are admitted. |
Maranhão (SEMA, 2011SECRETARIA DE ESTADO DO MEIO AMBIENTE - SEMA. Decreto nº 27845, 2011.) |
Downstream flow from bypasses may not exceed 80% of the 90% of the guaranteed reference flow rate. |
Mato Grosso (SEMA, 2007SECRETARIA DE ESTADO DO MEIO AMBIENTE - SEMA. Decreto nº 336, 2007.) |
The sum of the maximum flows cannot exceed the 95% of the guaranteed reference flow rate. |
Mato grosso do Sul (IMASUL, 2014INSTITUTO DE MEIO AMBIENTE DE MATO GROSSO DO SUL - IMASUL. Decreto nº 13990, 2014.) |
Maximum allowed flow rate at 70% of the reference flow, with 95% guaranteed.
Individual usage cannot exceed 20% of the 95% of the guaranteed reference flow rate.
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Minas Gerais (IGAM, 2001INSTITUTO MINEIRO DE GESTÃO DAS ÁGUAS - IGAM. Decreto nº 41578, 2001.) |
Maximum flow rate of 30% of the reference flow rate Q7,10 of the watercourse.
Maximum limit of 70% of the reference Q7,10, when reservoirs are used.
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Pará (CERH, 2010CONSELHO ESTADUAL DE RECURSOS HÍDRICOS - CERH . Resolução nº 10, 2010.) |
The sum of flows is limited to 70% of the reference flow rate, with 95% guaranteed.
The sum of unavailable flows is limited to 30% of the reference flow rate, with 95% guaranteed.
The maximum limit for capturing by reservoirs is 100% of the regularized flow, with 95% guaranteed, as long as 70% is guaranteed downstream.
The maximum limit for individual withdrawal is 20% of the reference flow rate with 95% guaranteed.
The maximum limit for unavailable flow is 10% of the 95% guaranteed flow.
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Paraíba (AESA, 1997AGÊNCIA EXECUTIVA DE GESTÃO DAS ÁGUAS DO ESTADO DA PARAÍBA - AESA . Decreto no 19260, 1997.) |
The sum of the volumes may not exceed 9/10 of the annual regulated flow, with 90% guaranteed. In lakes or ponds, the limit is reduced by 1/3. |
Paraná (AGUASPARANÁ, 2001INSTITUTO DAS ÁGUAS DO PARANÁ - AGUASPARANÁ. Decreto nº 4646, 2001.) |
Flows should correspond to the assured energy.
Maximum swallowing flow rate.
Guaranteed downstream flows.
Design flows.
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Pernambuco (APAC, 1998AGÊNCIA PERNAMBUCANA DE ÁGUAS E CLIMA - APAC. Decreto nº 20423, 1998.) |
The allowed flow cannot exceed 90% of the reference flow, with 90% guaranteed. |
Piauí (SEMAR, 2004SECRETARIA ESTADUAL DE MEIO AMBIENTE E RECURSOS HÍDRICOS - SEMAR. Decreto no 11341, Resolução CERH nº 4, 2004.) |
Flow for rivers with average monthly flow with 95% guaranteed, and reservoirs with 90% guaranteed.
For derivations and surface water withdrawal, an ecological flow rate of 20% of the reference flow rate was determined.
Maximum allocation of 80% of the 95% guaranteed flow rate for rivers, and 80% of the 90% of the guaranteed flow rate for reservoirs.
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Rio de Janeiro (INEA, 2007INSTITUTO ESTADUAL DO AMBIENTE - INEA. Portaria SERLA nº 567, 2007.) |
Minimum environmental flow of 50% of Q7,10, of the selected watercourse. |
Rio Grande do Sul (FEPAM, 1996FUNDAÇÃO ESTADUAL DE PROTEÇÃO AMBIENTAL DA SECRETARIA DO AMBIENTE E DESENVOLVIMENTO SUSTENTÁVEL - FEPAM. Decreto nº 37033, 1996.) |
Maximum allowed flow of 70%, of the reference flow with 90% guaranteed. |
Rio Grande do Norte (IGARN, 1997INSTITUTO DE GESTÃO DAS ÁGUAS DO RIO GRANDE DO NORTE - IGARN. Decreto nº 13283, 1997.) |
Grantable flow rate between 80% and 95% of the reference flow rate, with 90% guaranteed. |
Rondônia (SEDAM, 2004SECRETARIA DE ESTADO DO DESENVOLVIMENTO AMBIENTAL - SEDAM. Decreto nº 10114, Portaria SEDAM nº 38, 2004.) |
Allocable flow rate of 70% of Q7,10, of the chosen watercourse. |
Roraima (FEMARH, 2007FUNDAÇÃO ESTADUAL DO MEIO AMBIENTE E RECURSOS HÍDRICOS - FEMARH. Decreto nº 8123-E, 2007.) |
Flows measured in months of the dry period of the state. Studies, that include accepted users downstream of the capture point, or where there was no conflict of use.
Q7,10, Q90, or QL, can be used as the reference flow rate.
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Santa Catarina (SDS, 2006SECRETARIA DE ESTADO DO DESENVOLVIMENTO ECONÔMICO SUSTENTÁVEL - SDS. Decreto nº 4778, 2006.) |
Grantable flow rate of 50% of the reference flow rate, with 98% guaranteed, considering a technical reserve of 10% of the reference flow rate, with 98% guaranteed. |
São Paulo (DAEE, 2005) |
Maximum allowed flow of 50% of Q7,10 of the chosen watercourse, limited to 20% of Q7,10, for individual uses. |
Sergipe (SEMARH, 1999SECRETARIA DE ESTADO DO MEIO AMBIENTE E RECURSOS HÍDRICOS - SEMARH. Decreto nº 18456, 1999.) |
Maximum authorized flow rate between 85% and 95% guaranteed. Individual usage is limited to 30% of the adopted reference flow rate. |
Tocantins (NATURATINS, 2005INSTITUTO DE NATUREZA DO TOCANTINS - NATURATINS. Decreto nº 2432, 2005.) |
A maximum grantable flow rate on-stream of 75% of the reference flow rate, with 90% guaranteed.
Maximum flow rate authorized with a reservoir of up to 90% of the reference flow rate, with 90% guaranteed.
Individual usage limits at 25% of the reference flow rate, with 90% guaranteed.
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