Effectiveness Of Boezem As A Zero Runoff In Blimbing Subdistric, Malang

During the rainy season, inundation often occurs in Blimbing Hamlet, Malang, which caused by inadequate existing drains and lack of utilization in water catchment buildings. Therefore it is necessary to accommodate this condition using zero runoff concept, by utilizing boezem, which is expected there is no inundation at all by flowing flow immediately either seeping into the ground or into an artificial landfill. In Blimbing Hamlet, there is a boezem for serving and accommodating rainwater. For overcoming inundation in this area, maximalizing the boezem is significantly essential. This research is aimed to know the effectiveness of boezem for zero runoff. This assessment was done by hydrology analysis to obtain Q2, and Q5, for boezem planning, inlet outlets gate, and new drainage channels. The evaluation for existing drainage system showed there was inundation in some drainage channels. A boezem area of 836.9 m2 with 1.1 m depth can reduce inundation to 10%. Alternative inundation countermeasures are carried out with the added depth of 3 m, floodgates on inlets and outlets with of 0.5 m width steel gate, and drainage channel inlets and outlets. With the rehabilitation of boezem and other complementary buildings, it can reduce inundation by 30%.

Integrating ecology and zero runoff in a vertical village residential design in West Jakarta

Diminishing availability of urban land in metropolitan cities such as Jakarta resulting in high-density settlements, which impacted the quality of life of the urban village communities. One of the government’s efforts to solve this problem is by building subsidized apartments. However, this effort mainly focused on the land scarcity and the required housing aspects, while ecological and environmental roles toward the life quality of the dwellers are often set aside though very influential. On the other hand, Jakarta is very vulnerable to natural disasters related to water, such as flooding caused by stormwater runoff which cannot be accommodated by the insufficient capacity of the surrounding environment. Therefore, the development of urban settlements in Jakarta has to pay more attention to integrate ecology and zero runoff management from the design conception phase. A vertical village residential design in West Jakarta that integrates these two aspects through ecological architecture elements (nature, water, human and environment) was proposed as a role model design for vertical village housing. Various water design features have been creatively designed and integrated into the landscape and building elements resulting in zero runoff and an ecologically significant built environment.

Zero Runoff dan Konservasi Air Tanah Melalui Pemanfaatan Paving Block Biopori di Kawasan Permukiman

Zero runoff identik dengan suatu upaya untuk meminimalisir limpasan akibat hujan di permukaan lahan. Upaya ini digunakan sebagai bentuk mempercepat waktu kuras limpasan di dalam kawasan permukiman yang saluran drainasenya kurang berfungsi maksimal. Solusi untuk zero runoff di permukiam adalah menggunakan media lubang biopori. Lubang biopori merupakan salah satu bentuk teknologi tepat guna multifungsi, karena dapat mengurangi limpasan hujan sekaligus untuk konservasi air tanah dengan cara meresapkan air ke dalam tanah melalui lubang-lubang yang dibuat dengan ukuran tertentu. Bahan paving block bertujuan agar pekarangan/lahan menjadi rapi, bersih dan rata, namun mengurangi kemampuannya meresapkan air ke dalam tanah menjadi berkurang. Oleh karena itu dibutuhkan paving block biopori, yaitu paving block yang diberi lubang berukuran tertentu. Metode ini sangat cocok disosialisasikan dan diterapkan di pemukiman padat penduduk di suatu kawasan perkotaan. Hasil riset pendahuluan menunjukkan, bahwa lubang biopori mampu mereduksi genangan air akibat limpasan air hujan sebesar ± 15 % di awal musim hujan dan menurun menjadi ± 2% di akhir musim hujan, dengan laju peresapan air per lubang 3 liter/menit di awal musim hujan dan menurun menjadi ± 0,4 liter/menit di akhir musim hujan. Kegiatan sosialisasi dan penyuluhan tentang zero runoff dan biopori mampu meningkatkan pengetahuan warga masyarakat tentang cara pembuatan lubang biopori secara mandiri dan berbagai manfaatnya yang multifungsi

Two Food Waste By-Products Selectively Stimulate Beneficial Resident Citrus Host-Associated Microbes in a Zero-Runoff Indoor Plant Production System

The global production of food waste is a far-reaching problem with sizable financial, ethical, social, and environmental costs. Over 66 million tons of food waste is produced annually in the United States alone. This waste can be converted into valuable digestate by-products that promote a circular economy within agri-food systems. The present work investigated the use of two liquid digestates of microaerobic fermentation from mixed food waste and beer mash, respectively, as biostimulants for non-bearing citrus plants (nursery stock) grown in a zero-runoff greenhouse system with recirculating irrigation. The digestates' impact on the structure and diversity of the microbiota was determined on the irrigation water, soil, leaves, roots, and rhizosphere of citrus plants. A combination of culture-dependent (selective media) and culture-independent approaches (Next-Generation Sequencing) was used to assess the composition of the microbial communities and to single out the presence of foodborne pathogens. Our results suggest that the use of digestates is safe (i.e., no human or plant pathogens were present in the digestates or enriched in the plant production system following amendments). Digestates application to the irrigation water reduced the bacterial diversity within 24–48 h and selectively and significantly stimulated beneficial resident host-associated microorganisms (Pseudomonas putida) by two to three orders of magnitude. Carbon dynamics were analyzed in the nutrient solutions by measuring dissolved organic carbon and characterizing carbon species through gas chromatography-electron ionization-mass spectrometry. Our results indicate that dissolved organic carbon in the recirculating irrigation water spikes after each digestate amendment and it is quickly metabolized by bacteria, plateauing 24 h after application. Soil carbon, nitrogen, and nutrient dynamics were also analyzed, and results suggest that digestates increased the concentration of some plant nutrients in soils without causing a surge of potentially toxic elements. This study represents a proof-of-concept for the safe re-use of organic wastes, from farming and consumers, in agriculture. Implementing this type of integrated plant production system could reduce the environmental impact of food waste and benefit the public by improving soil health, reducing agricultural footprint, and increasing crop fitness by deploying a method based on a circular economy and sustainable food production approaches.

EVALUASI FAKTOR TEKNIS PENENTU KRITERIA DRAINASE BERWAWASAN LINGKUNGAN

<span><em>Integrated management of water resources is something that must be done to ensure the sustainability of </em><span><em>water resources. Based on Minister of Public Works Regulation No. 10 of 2015, water resources </em><span><em>management in Indonesia is based on 5 pillars where one of the pillars is the conservation of water</em><br /><span><em>resources. Conservation of water resources is a basic concept of ecodrain wherein rainwater falling as much </em><span><em>as possible will be absorbed into the ground again or known as zero runoff. One of the technical factors that</em><br /><span><em>determine environmentally sound drainage criteria is the recharge system. In this research, the influence of </em><span><em>the application of bioretension and rain garden will be discussed as one of the absorption systems for runoff </em><span><em>hydrographs in an area, in this case the Upper Cisadane Watershed is used as the research location. Based </em><span><em>on the results of the study, it was obtained the reduction of peak flood discharge with the application of type </em><span><em>I, II, III and IV biorescence to the existing peak flood discharge of 26.89-26.93%, and reduction of peak flood </em><span><em>discharge with the application of rain garden of 27.73%.</em></span></span></span></span></span></span></span></span></span></span><br /><br class="Apple-interchange-newline" /></span>

Integrating Infiltration Facility to Urban Road Drainage

It is proposed to merge an infiltration facility to the conventional road curb system. Towards this end, a Storm Water Management Model (SWMM) is developed to explore the effectiveness of the proposed component at Riveria housing estate, Kota Samarahan, Sarawak. The findings show that the integration is effective in reducing peak runoff. The results indicate that a scenario of hollow infiltration trench achieves zero runoff, and a scenario of filled infiltration trench has a 43.6% reduction in runoff compared with existing road drainage condition. Furthermore, the hollow infiltration trench is found to be the best among all the given scenarios. The SWMM modelling results provide a tool to quantitatively measure the probable use of the proposed measures to improve the existing road drainage system.

Penerapan Zero Runoff System (ZROS) dan Efektivitas Penurunan Limpasan Permukaan Pada Lahan Miring di DAS Cidanau, Banten

Runoff is one of flood and erosion causal factor in Indonesia. Runoff occurred when rainfall cannot be infiltrated and flowed on the ground surface. Cidanau watershed has quite high rainfall average (2573 mm/year) so it has high runoff potential. Zero Runoff System (ZROS) is one of water conservation way which can infiltrate runoff to the ground using permeation structures. ZROS’s successful parameter in order to decreasing runoff rate can be observed by the soil water content differences before and after ZROS application. Soil water content estimation was conducted by water balance model with and without runoff and then it is compared with soil water content from measuring. The simulation results indicated that soil water content in the research field before and after ZROS application is 0.476 and 0.569 m3/m3 respectively. The simulation is also conducted for past 10 years (2004-2013) and resulted higher soil water content if ZROS were applied. This results indicates that ZROS capable to decrease and permeate runoff to the ground and then increase soil water content level. Water balance model with and without runoff has coefficient of determination (R2) 0.606. It means that this model could simulate the soil water content differences before and after ZROS application valid relatively.

Reduksi Volume Limpasan Air Hujan Menggunakan Sumur Resapan dengan Konsep Zero Runoff System (ZROS) di Gampong Laksana Kota Banda Aceh

Abstrak. Genangan permukaan atau banjir dapat ditangani salah satunya dengan memperbesar peresapan air kedalam tanah menggunakan sumur resapan. Penelitian ini bertujuan untuk mengetahui jumlah sumur resapan yang diperlukan dalam upaya pengurangan genangan. Penelitian ini diawali dengan survei kawasan, pengumpulan data tinggi muka air tanah dari sumur galian, data curah hujan dan data klimatologi selama periode 2006–2015, penentuan luas penutupan secara digitasi menggunakan aplikasi Google Earth Pro dan luas atap dibagi berdasarkan rumus Sturgess. Berdasarkan data curah hujan harian Kota Banda Aceh, perhitungan intensitas hujan rancangan periode ulang 5 tahun sebesar 33,951 mm/jam, sehingga menghasilkan debit banjir rancangan 1,706 m3/detik. Rata-rata tinggi muka air tanah pada kawasan ini sebesar 54,7 cm pada musim penghujan, dengan nilai permeabilitas rata-rata tanah sebesar 11,932 cm/jam. Sumur resapan dirancang dengan kedalaman 1,5 m, dengan diameter 1,4 m. Penggunaan sumur dihitung berdasarkan 2 tipe, yaitu A (dinding sumur ber-lining) dan B (dinding tak ber-lining) pada masing-masing kelas atap. Total luas tadah hujan atap 14,93 Ha hasil digitasi dibagi atas 12 kelas berdasarkan rumus Sturgess, yaitu: kelas 1 (18-158 m2), kelas 2 (159-299 m2), kelas 3 (300-440 m2), kelas 4 (441-581 m2), kelas 5 (582-722 m2), kelas 6 (723-863 m2), kelas 7 (864-1004 m2), kelas 8 (1005-1145 m2), kelas 9 (1146-1286 m2), kelas 10 (1287-1427 m2), kelas 11 (1428-1568 m2) dan kelas atap yang terakhir kelas 12 (1569-1709 m2). Semakin luas bidang tadah (atap) maka kebutuhan akan sumur resapan juga akan semakin besar. Total luas tadah hujan atap (14,93 Ha) sekurang-kurangnya membutuhkan ± 1.618 sumur tipe A, dan ± 1.316 tipe B yang dapat mereduksi limpasan air hujan sebesar 32,53 % (tipe A) dan 53,58 % (tipe B) dari debit banjir total Gampong Laksana.Reduced Volume of Rainfall Runoff by infiltration Well with Zero Runoff System Concept (ZROS) in Laksana Town of Banda AcehAbstract. Surface run-off can be handled one of them by enlarging the infiltration of water into the soil using absorption wells. This study aims to determine the number of absorbing wells needed in the effort to reduce the puddle. The study begins with a survey of the area, groundwater level data collection of excavated wells, rainfall data and climatological data during the period 2006-2015, the determination of the digitized closure area using the Google Earth Pro application and the area of the roof divided according to the Sturgess formula. Based on the daily rainfall data of Kota Banda Aceh, the calculation of the rain intensity of the 5 year re-design period is 33,951 mm /hour, resulting in flood discharge of 1,706 m3/ sec. The average groundwater level in this area is 54,7 cm in the rainy season, with an average permeability of 11,932 cm/hour. The absorption well is designed with a depth of 1.5 m, with a diameter of 1.4 m. The use of wells is calculated based on 2 types, namely A (well lining wall) and B (non-lining wall) in each roof class. Total rainfed area 14,93 Ha result of digitasi divided into 12 classes based on Sturgess formula, namely: class 1 (18-158 m2), class 2 (159-299 m2), grade 3 (300-440 m2), grade 4 (Grade 441-581 m2), grade 5 (723-862 m2), grade 7 (864-1004 m2), grade 8 (1005-1145 m2), grade 9 (1146-1286 m2) ), Class 10 (1287-1427 m2), grade 11 (1428-1568 m2) and the last class of class 12 (1569-1709 m2). The larger the field of cistern (roof) then the need for absorption wells will also be greater. The total rainfed area of 14,93 hectares requires at least ± 1.618 wells of type A, and ± 1.316 type B which can reduce rainfall runoff by 32,53% (type A) and 53,58% (type B) from the discharge The total flood of Gampong Laksana.