Abstract
<span class="fontstyle0">One of the problems in the freshwater fisheries sector is the phenomenon of upwelling can occur anytime without warning signs, especially in lakes and lake. This problem causes a failed harvest and fish farming business owners suffered a great loss due to the death of fish in large numbers. Upwelling caused by toxic substances results increased nitrification from fish feces and remaining fish feed deposited at the bottom of the Lake and rises to the surface quickly. Ammonia (NH3) in the form of ionized causing no fish that are on the surface of the Lake is not enough oxygen to meet the needs of hemoglobin, so cannot bind oxygen or lack of dissolved oxygen (DO). The condition causes the death of the fish very much. This research built a monitoring system to monitor the condition of the temperature at the surface and at the underwater of the lake and to monitor DO levels to check the possibility of upwelling. Temperature sensor and DO sensor connect with microcontroller and . The results of experiment system on the area fish farms (karamba) and not the area fish farms, obtained the test results are accurate and real time.</span>
Highlights
Upwelling is the phenomenon of the rise of the cold-temperature water and its sediments from the bottom of the waters towards the surface waters vertically that can occur in salt water and freshwater (Lakes) (Shaw, P.T., et al, 1996)
Based on wireless sensor network (WSN) and machine to machine (M2M) communication and wireless sensor network, we built the system to monitor the below and surface temperature of the water and dissolved oxygen (DO) level using sensors connected to the microcontroller
Freshwater upwelling generally occurs in the rainy season with low sunlight conditions and cold winds causing the temperature on the surface of the water to become colder (Shaw, P.T., et al, 1996) (Quibell, G., 1992)
Summary
Upwelling is the phenomenon of the rise of the cold-temperature water and its sediments from the bottom of the waters towards the surface waters vertically that can occur in salt water (the sea) and freshwater (Lakes) (Shaw, P.T., et al, 1996). While in fresh water, where water flow current tends to be static, this phenomenon causes the rise of toxic material i.e. fish feed and fish droppings left containing ammonia (NH3) from the base to the surface of the water. At the time of the rise of oxygen reduction occurred because the material is pushed by toxic gasses (NH3) causing a number of dissolved oxygen levels dropped dramatically. Based on wireless sensor network (WSN) and machine to machine (M2M) communication and wireless sensor network, we built the system to monitor the below and surface temperature of the water and DO level using sensors connected to the microcontroller. The system that has been tested on experimental environments are tested in the real environment
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