Prototype Sistem Monitoring Kekeruhan Sumber Mata Air Berbasis Internet of Things

Water is very important for the life of living things on earth. The function of water for life cannot be replaced, but water taken directly from springs often experiences turbidity which usually occurs during the rainy season where excessive rainwater intensity can affect the clarity of the water flowing into people's homes. From this problem, it is necessary to design a monitoring sistem for the turbidity of water flowing into the main tank which can be monitored via laptops, computers or cellphones that have internet access that can monitor in real-time and in the form of graphs and data stored in My Structured Query language (mysql) in this design. Using the nodemcu esp8266 which controls the tool in the design, the turbidity sensor is used to detect water turbidity, the ultrasonic sensor is used to detect the water level in the main tank, the relay is used to control the electric current, the solenoid valve is used to close the valve according to the conditions given with the design results of 120 ntu down and water height > 15 cm then the on relay and solenoid valve open the valve so that water can flow into the reservoir, while 121 ntu up and water height < 5 cm then the off relay and solenoid valve close the valve, the test is done using blackbox testing and the results of this test that the function on the sistem is 100% appropriate.

Techno-Economic Study of a New Hybrid Solar Desalination System for Producing Fresh Water in a Hot–Arid Climate

By taking advantage of the obtained experimental data, the impact of employing concentrating solar collectors, using an electric heater, and changing the water height in the basin on the performance of a hybrid solar still system was investigated. Eight different operating modes for the system were studied, while the daily freshwater production in addition to the cost per liter (CPL) was considered as the performance criteria. According to the results, the best height of water in the basin is 10 mm. It is the lowest examined height. Moreover, it was found that using the hybrid system with both electric heater and concentrating solar heater brings considerable improvements compared to the other investigated operating modes. For the climatic condition of Sirjan, Iran, which is where the experiments were performed, and water height in the basin of 10 mm, using the hybrid system in the active mode results in 8178 mL/m2 of fresh water production, and a CPL of $0.04270 per liter.

Rancang Bangun Multi Sensor Pengukur Tinggi Muka Air Untuk Lahan Sawah

Abstrak. Penghematan air untuk irigasi permukaan adalah salah satu cara mengurangi efek lingkungan dari budidaya tanaman padi. Dalam sistem AWD(Alternate Wetting Drying) lahan sawah digenangi secara berselang, ketinggian air dari permukaan tanah dimonitor sesuai dengan rekomendasi AWD. Metode ini terbukti dapat mengurangi penggunaan air tanpa mengurangi hasil panen. Perkembangan saat ini pada platform cloud IOT sensor-sensor dapat berhubungan langsung dengan sistem yang menyimpan data dalam kapasitas yang besar, data ini selanjutnya dapat didownload dan diproses. Penelitian ini bertujuan untuk mendesain sistem multi sensor alat pengukur ketinggian permukaan air yang memiliki catu daya yang bersumber pada energi matahari dan dilegkapi dengan baterai Li-Ion dan berbentuk ringkas. Komunikasi dari masing masing sensor ke rangkaian master dilakukan melalui komunikasi radio. Mode hemat daya yang menonaktifkan sensor dan modul radio pada kondisi stanby dapat menghemat pemakaian baterai, tanpa penyinaran matahari baterai dapat bertahan 11,6 hari dibadingkan dengan 3,2 hari pada mode non hemat daya.Tegangan baterai dan pembacaan ketinggian permukaan air diupload ke ThinkSpeak IoT cloud oleh rangkaian master, untuk dianalisa lebih lanjut. Design of Paddy Field Water Level Multi Censor Abstract. Water conservation for field irrigation is an important key to reducing environmental effects from paddy cultivation. In the AWD (Alternate Wet Drying) method, the rice field is alternately flooded and non-flooded, water height is always measured to adjust with AWD recommendation. This method proved for reducing water usage without decreasing yield. With recent development from IoT Cloud platform, sensors can interface directly to cloud systems and store much data so it can be downloaded and processed later. In this study, electronic water height multiple sensors based on infrared technology is equipped with solar panel and Li-Ion battery storage designed with a compact form. Communication from sensors to master done by radio wave. Power saving method which turnoff sensors and radio power in the standby condition can conserve battery to stand the power without sunlight 11.6 days compared to 3.2 days in non-power-saving design. Battery voltage and water level reading from each sensor is uploaded to Think Speaks cloud IoT dashboard, this data can be analyzed later for other purposes.

Power Generation and Oxygen Transfer Analyses for Micro Hydro-Turbine Installed in Wastewater Treatment Aeration Tank

This study targets one of the major energy consumers in the U.S. It suggests a new mechanical system that can recover a portion of the energy in Wastewater Treatment Plants (WWTPs). The proposed system entails a hydro-turbine installed above the air diffuser in the aeration tank to extract the water-bubble current's kinetic energy and converts it to electricity. Observing the optimum location of the turbine required multiple experiments where turbine height varies between 35% and 95% (water height percentages above the diffuser), while varying the airflow between 1.42 L/s (3 CFM) and 2.12 L/s (4.5 CFM) with a 0.24 L/s (0.5 CFM) increment. Additionally, three water heights of 38.1 cm (15”), 53.4 cm (21”), and 68.6 cm (27”) were considered to study the influence of the water height. It was noticed that the presence of the system has an adverse effect on the Standard Oxygen Transfer Efficiency (SOTE). Therefore, a small dual-blade propeller was installed right above the diffuser to directly mix the water in the bottom of the tank with the incoming air to enhance the SOTE. The results showed that the maximum reclaimed power was obtained where the hydro-turbine is installed at 65% - 80% above the diffuser. A reduction of up to 7.32% in SOTE was observed when the setup was placed inside the tank compared to the tank alone. The addition of the dual-blade propeller showed an increase in SOTE of 7.27% with a power loss of 6.21%, ensuring the aeration process was at its standards.

Near real time flood inundation mapping using social media data as an information source: a case study of 2015 Chennai flood

During and just after flash flood, data regarding water extent and inundation will not be available as the traditional data collection methods fail during disasters. Rapid water extent map is vital for disaster responders to identify the areas of immediate need. Real time data available in social networking sites like Twitter and Facebook is a valuable source of information for response and recovery, if handled in an efficient way. This study proposes a method for mining social media content for generating water inundation mapping at the time of flood. The case of 2015 Chennai flood was considered as the disaster event and 95 water height points with geographical coordinates were derived from social media content posted during the flood. 72 points were within Chennai and based on these points water extent map was generated for the Chennai city by interpolation. The water depth map generated from social media information was validated using the field data. The root mean square error between the actual water height data and extracted social media data was ± 0.3 m. The challenge in using social media data is to filter the messages that have water depth related information from the ample amount of messages posted in social media during disasters. Keyword based query was developed and framed in MySQL to filter messages that have location and water height mentions. The query was validated with tweets collected during the floods that hit Mumbai city in July 2019. The validation results confirm that the query reduces the volume of tweets for manual evaluation and in future will aid in mapping the water extent in near real time at the time of floods.

Extreme floods of Venice: characteristics, dynamics, past and future evolution (review article)

Floods in the Venice city centre result from the superposition of several factors: astronomical tides; seiches; and atmospherically forced fluctuations, which include storm surges, meteotsunamis, and surges caused by atmospheric planetary waves. All these factors can contribute to positive water height anomalies individually and can increase the probability of extreme events when they act constructively. The largest extreme water heights are mostly caused by the storm surges produced by the sirocco winds, leading to a characteristic seasonal cycle, with the largest and most frequent events occurring from November to March. Storm surges can be produced by cyclones whose centres are located either north or south of the Alps. Historically, the most intense events have been produced by cyclogenesis in the western Mediterranean, to the west of the main cyclogenetic area of the Mediterranean region in the Gulf of Genoa. Only a small fraction of the inter-annual variability in extreme water heights is described by fluctuations in the dominant patterns of atmospheric circulation variability over the Euro-Atlantic sector. Therefore, decadal fluctuations in water height extremes remain largely unexplained. In particular, the effect of the 11-year solar cycle does not appear to be steadily present if more than 100 years of observations are considered. The historic increase in the frequency of floods since the mid-19th century is explained by relative mean sea level rise. Analogously, future regional relative mean sea level rise will be the most important driver of increasing duration and intensity of Venice floods through this century, overcompensating for the small projected decrease in marine storminess. The future increase in extreme water heights covers a wide range, largely reflecting the highly uncertain mass contributions to future mean sea level rise from the melting of Antarctica and Greenland ice sheets, especially towards the end of the century. For a high-emission scenario (RCP8.5), the magnitude of 1-in-100-year water height values at the northern Adriatic coast is projected to increase by 26–35 cm by 2050 and by 53–171 cm by 2100 with respect to the present value and is subject to continued increase thereafter. For a moderate-emission scenario (RCP4.5), these values are 12–17 cm by 2050 and 24–56 cm by 2100. Local subsidence (which is not included in these estimates) will further contribute to the future increase in extreme water heights. This analysis shows the need for adaptive long-term planning of coastal defences using flexible solutions that are appropriate across the large range of plausible future water height extremes.

TEKNIS PRODUKSI PEMBENIHAN DAN PENDEDERAN IKAN LEMON ALGAE EATER Gyrinocheilus aymoneiri DI ADE’S FISH FARM, KABUPATEN BOGOR, JAWA BARAT

ABSTRACTLemon fish Algae Eater is one of the aquarium fish which is well-known as Algae Eater. The Lemon Algae Eater is placed in a pond measuring 2 m x 3 m x 0.8 m, with a water height of 50 cm. For optimum health, feed the Algae Eater with Feng Li pellets by having a restricted feeding method or this can also be limited to 5% from the brood fish weight. The semi-natural hatchery of Lemon fish Algae Eater is needed. An aquarium (100cm x 60 cm x 50 cm) with a water height of 30 cm is needed for the hatchery of Lemon fish Algae Eater eggs. The average fecundity of Lemon fish Algae Eater eggs produced in 1 spawning can reache up to 84 742 eggs with the average of Fertilization Rate is 79%, the Hatching Rate is 83%, and the Survival Rate is 74%. The Lemon Algae Eater eggs will hatch in 10-12 hours. Fish nursery of lemon fish algae eater is used pond measures 3 m x 2 m x 1.5 m. The freshly hatched larvae are harvested at the age of 30 days and 45 days with a size of 1.2-1.5 cm/fish and 2.5-3 cm/fish. ABSTRAKLemon algae eater merupakan salah satu ikan aquarium yang dikenal sebagai pemakan alga. Pemeliharaan ikan lemon algae eater dilakukan pada bak beton yang berukuran 2 m x 3 m x 0.8 m, dengan tinggi air 50 cm. Pakan yang diberikan berupa pelet feng li dengan metode pemberian pakan restricted atau metode dibatasi dengan 5% dari bobot induk. Pemijahaan induk ikan lemon algae eater dilakukan secara semi alami. Wadah penetasan telur ikan lemon algae eater menggunakan akuarium ukuran 100 cm x 60 cm x 50 cm dengan tinggi air 30 cm. Rata-rata fekunditas telur ikan lemon algae eater yang dihasilkan dalam 1 kali pemijahan mencapai 84 742 butir telur dengan memiliki nilai rata-rata Fertilization Rate sebesar 79%, Hatching Rate sebesar 83%, dan Survival Rate sebesar 74%. Telor ikan lemon algae eater akan menetas dalam waktu 10-12 jam. Kegiatan pendederan ikan lemon algae eater menggunakan wadah bak beton yang berukuran 3 m x 2 m x 1.5 m. Benih yang dipanen berumur 30 hari dan 45 hari dengan ukuran 1.2 -1.5 cm/ekor dan 2.5 - 3 cm/ekor.

A Low-Cost Sensor for Detecting Illicit Discharge in Sewerage

The presence of illicit discharges in sewerage systems generates an important impact in wastewater treatment plants and the ecosystem. In this paper, we present two prototypes for monitoring the presence of solids in wastewater and to study the effect of the water height. The prototypes are based on color and infrared LEDs and two photosensors located in the prototypes at 0° and 180° degrees. When the photosensor is located at 180°, all color LEDs present a good range of output voltage (approximately 5 V to 0 V) and good R2. However, for the typical concentration of solids in wastewater, the prototypes do not work correctly. When the photosensor is located in the prototypes the LEDs, yellow, red, and white have a good operation with voltage differences of 1.73 V, 1.76 V, and 1.13 V in P1 and 1.58 V, 1.84 V, and 1.35 V in P2, respectively. We calculate the mathematical model with the heights and solid concentration. The mathematical models which do not consider height present good R2. In conclusion, when the photosensor is located in the prototype, the height does not have an important effect and can detect the illicit discharge of solids. When the photosensor is located at 180°, it can be used for water with important changes in solid concentrations.

Reconstructing GRACE-type time-variable gravity from the Swarm satellites

The Gravity Recovery and Climate Experiment (GRACE) mission has enabled mass changes and transports in the hydrosphere, cryosphere and oceans to be quantified with unprecedented resolution. However, while this legacy is currently being continued with the GRACE Follow-On (GRACE-FO) mission there is a gap of 11 months between the end of GRACE and the start of GRACE-FO which must be addressed. Here we bridge the gap by combining time-variable, low-resolution gravity models derived from European Space Agency’s Swarm satellites with the dominating spatial modes of mass variability obtained from GRACE. We show that the noise inherent in unconstrained Swarm gravity solutions is greatly reduced, that basin averages can have root mean square errors reduced to the order of $$\text {cm}$$ cm of equivalent water height, and that useful information can be retrieved for basins as small as $$1000 \times 1000\,\hbox {km}$$ 1000 × 1000 km . It is found that Swarm data contains sufficient information to inform the leading three global mass modes found in GRACE at the least. By comparing monthly reconstructed maps to GRACE data from December 2013 to June 2017, we suggest the uncertainty of these maps to be $$2{-}3\,\text {cm}$$ 2 - 3 cm of equivalent water height.