Data/hora: 07/06/2024 11:50:01

Biblioteca(s): 	Epagri-Sede.	
Data corrente: 	09/12/2015	
Data da última atualização: 	09/12/2015	
Autoria: 	GARBOSSA, L. H. P.; WOJCIKIEWICZ, C. A.; BONETTI, C. V. D. H. C.; VIEIRA, F. N.; LAPA, K. R.	
Título: 	WATER BALANCE MONITORING AND COMPARISON FOR TWO SRHIMP PONDS OF Litopenaeus vannamei.	
Ano de publicação: 	2015	
Fonte/Imprenta: 	In: FEIRA NACIONAL DO CAMARÃO & LACQUA/SARA (WAS)?15, 12., 2015, Fortaleza. Resumos... Fortaleza: WAS, 2015. p. 442	
Idioma: 	Inglês	
Conteúdo: 	The water availability in quantity and quality should be one of the main concerns for aquaculture because of its evident dependency on it. Besides, charges for water use begin to occur in some Brazilian sectors and eventually will reach aquaculture. Therefore, the knowledge of the water demand and fate is the first step in adequately managing the available water. The water balance was developed during the accomplishment of a project supported by the National Network on Shrimp. The project was carried out in a Shrimp farm with 18 ponds, located in the Northeast region of the Santa Catarina state. The water flux of the shrimp farm was accompanied on two shrimp ponds, number 2 and 5 (P2 and P5). The monitored ponds have, approximatively, 10,593 m2 and 12,053 m2, respectively. During the production cycle the ponds P2 and P5 were operated with an average water level of 123 cm and 114 cm, respectively. The most important water sources and sinks were monitored. The first water source was the filling process with water from the nearby estuary. Once it was filled, the controlling process were precipitation, evaporation and infiltration. A rain gauge was installed in the farm area to monitor the total rain height in loco. Other weather parameters like radiation, wind, temperature and humidity were obtained from a weather station located 7 km from the farm. Although, considering that the pounds are less than 150 m apart one may assume that they are subjected to the same weather condition, thus present the same potential evaporation. The water level gauges (WLG) were installed in each one of the ponds and a reference level was obtained to correlate the pond bottom to the WLG time series. The total precipitation height during the production cycle (pd) was 511 mm.pd-1 and the P2 and P5 water level balance were 170 mm.pd-1 and 110 mm.pd-1, respectively. This resulted in a water level difference of 60 mm.pd-1.The two possibilities that lead to this result is the differences on soil infiltration rate or direct water loss in the water gate. The average of sand content in P5 is, approximately, 13% higher than in P2. This may lead to a higher hydraulic conductivity and lead to the 60 mm difference in the water level balance. The second and most probable reason is the leakage in the water gate.  The next step is to calculate the evaporation based on weather parameters and on the nearest Class A pan and correlate with the results obtained in the ponds.	
Palavras-Chave: 	balance; use; water.	
Categoria do assunto: 	P Recursos Naturais, Ciências Ambientais e da Terra	
URL: 	http://intranetdoc.epagri.sc.gov.br/producao_tecnico_cientifica/DOC_37152.pdf	
Registro original: 	Epagri-Sede (Epagri-Sede)	
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