What do we know about Indonesian tropical lakes? Insights from high frequency measurement

Global Colloquium on GeoSciences and Engineering 2017

Santoso, Arianto Budi^1 ; Triwisesa, Endra^1 ; Fakhrudin, Muh.^1 ; Harsono, Eko^1 ; Rustini, Hadiid Agita^1

Research Centre for Limnology, Indonesian Institute of Science (LIPI), Cibinong, Indonesia^1

关键词: 3-D numerical modeling;    Ecological variables;    High frequency measurements;    Lake sand reservoirs;    On-line monitoring system;    Sampling frequencies;    Solar radiation intensity;    Temperature profiles;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/118/1/012024/pdf
DOI  :  10.1088/1755-1315/118/1/012024

来源: IOP

【 摘 要 】

When measuring ecological variables in lakes, sampling frequency is critical in capturing an environmental pattern. Discrete sampling of traditional monitoring programs is likely to result in vital knowledge gaps in understanding any processes particularly those with fine temporal scale characteristics. The development of high frequency measurements offer a sophisticated range of information in recording any events in lakes at a finer time scale. We present physical indices of a tropical deep Lake Maninjau arrayed from OnLine Monitoring System (OLM). It is revealed that Lake Maninjau mostly has a diurnal thermal stratification pattern. The calculated lake stability (Schmidt stability), however, follows a seasonal pattern; low in December-January and around August, and high in May and September. Using a 3D numerical model simulation (ELCOM), we infer how wind and solar radiation intensity control lake's temperature profiles. In this review, we highlight the needs of high frequency measurement establishment in Indonesian tropical lakes to better understand the unique processes and to support the authorities' decision making in maximizing the provision of ecosystem services supplied by lakes and reservoirs.