scholarly journals Evaluasi Jaringan Drainase Kecamatan Tanjung Kabupaten Lombok Utara

2021 ◽  
Vol 6 (2) ◽  
pp. 184-197
Author(s):  
Ari Ramadhan Hidayat
Keyword(s):  
Human Activities ◽  
Rainy Season ◽  
Total Population ◽  
Drainage System ◽  
Environmental Problems ◽  
Natural Conditions ◽  
Drainage Channels

North Lombok Regency is located north of the below of Mount Rinjani where this area consists of five sub-districts, i.e., Pemenang, Tanjung, Gangga, Kayangan, and Bayan sub-districts, with a total population of 220,412 people. Despite being the youngest district, it has many problems, one of which is environmental problems, such as flooding and inundation. During the rainy season, inundation occurs in several locations in Tanjung District. Inundation happens because the existing drainage system is not functioning correctly. Based on the background mentioned before, a study was conducted to determine the condition of the existing channel, the factors causing inundation, and appropriate actions to overcome the problem of flooding and inundation in Tanjung District, North Lombok Regency. The method used in this research is to make observations and surveys in the field. From the analysis results, it is known that the problems of flooding and inundation in Tanjung District, North Lombok Regency are influenced by natural conditions and human activities. The solution or action that can be taken is to redesign and repair the damaged canal walls and clean the drainage channels from sediment and pile of trash.ABSTRAKKabupaten Lombok Utara berada di sebelah utara kaki Gunung Rinjani. Terdiri dari lima kecamatan yakni Kecamatan Pemenang, Tanjung, Gangga, Kayangan, dan Bayan dengan total jumlah penduduk 220.412 jiwa. Meskipun menjadi kabupaten termuda, banyak permasalahan yang dihadapi, salah satunya permasalahan lingkungan, seperti banjir dan genangan. Ketika musim penghujan terjadi genangan di beberapa lokasi di Kecamatan Tanjung. Hal ini disebabkan oleh sitem drainase yang ada tidak berfungsi dengan baik. Berdasarkan latar belakang di atas, dilakukan penelitian untuk mengetahui kondisi saluran eksisting, faktor penyebab terjadinya genangan dan upaya apa yang sesuai untuk menanggulangi permasalahan banjir dan genangan di Kecamatan Tanjung Kabupaten Lombok Utara. Metode yang digunakan dalam penelitian ini adalah dengan melakukan observasi dan survey di lapangan. Hasil dari analisi diketahui bahwa permasalahan banjir dan genangan di Kecamatan Tanjung Kabupaten Lombok Utara dipengaruhi oleh kondisi alam dan aktivitas manusia. Upaya yang dapat dilakukan saat ini adalah dengan melakukan redesain dan perbaikan pada dinding-dinding saluran yang mengalami kerusakan serta membersihkan saluran drainase dari tumpukan sedimentasi dan sampah.

Restructuring of Backrest and Drainage Provision System in the Campus Area

2021 ◽  
Vol 6 (4) ◽  
pp. 16-21
Author(s):  
Ofik T. Purwadi ◽  
L. Afriani ◽  
A. Zakaria
Keyword(s):  
Land Use ◽  
Surface Runoff ◽  
Rainy Season ◽  
Open Space ◽  
Land Use Changes ◽  
Drainage System ◽  
Flood Inundation ◽  
Drainage Channels ◽  
The University ◽  
Artificial Reservoirs

The University of Lampung area, especially in the Faculty of ISIP, FEB, and FT is a densely packed student area. This area has undergone many land-use changes. The condition of the land as a green open space has changed its function to become an area for lecture buildings and offices. One of the impacts is an increase in direct surface runoff and a decrease in the quantity of water that seeps into the ground, this condition causes flooding during the rainy season. To facilitate the rehabilitation of the drainage system in the University of Lampung area, it is necessary to redesign the drainage system of the University of Lampung area. Rehabilitation of drainage channels is carried out to resolve flood inundation points that occur during the rainy season. Rainwater that is channeled through drainage channels is directed to natural or artificial reservoirs. The collected rainwater is used to recharge groundwater through natural infiltration methods. The analysis carried out in this study includes hydrological analysis and analysis of the existing drainage sections and the solutions are given. The hydrological analysis aims to calculate the planned discharge using the rational method. Modeling with the application used in this study aims to determine the capacity of the water level in the existing channel. Based on the results of the analysis, in the area, the Faculty of Engineering experienced runoff and inundation. This situation requires rehabilitation of the Lampung University area drainage system.

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

2021 ◽  
Vol 930 (1) ◽  
pp. 012037
Author(s):  
U Andawayanti ◽  
E N Cahya ◽  
A Fitriyasari ◽  
C Saleh
Keyword(s):  
Rainy Season ◽  
Drainage System ◽  
Drainage Channel ◽  
Drainage Channels ◽  
Zero Runoff ◽  
Water Catchment ◽  
Steel Gate

Abstract 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%.

scholarly journals THE OLVIOS, RETHIS AND INACHOS DRAINAGE SYSTEM EVOLUTION AND HUMAN ACTIVITIES INFLUNCE OF THEIR FUTURE EVOLUTION

2017 ◽  
Vol 43 (2) ◽  
pp. 548 ◽  
Author(s):  
Th. Anagnostoudi ◽  
S. Papadopoulou ◽  
D. Ktenas ◽  
E. Gkadri ◽  
I. Pyliotis ◽  
...  
Keyword(s):  
Coastal Area ◽  
Human Activities ◽  
Drainage System ◽  
Physical Factors ◽  
Drainage Systems ◽  
System Evolution ◽  
Corinth Gulf ◽  
Future Evolution ◽  
Tectonic Regime ◽  
Flow Element

Olvios, Rethis and Inachos Rivers are multistory drainage systems that occur in Northern Peloponnesus, and at the present day they have and a reversed, North to South, flow element. Dervenios, Skoupeikos and Fonissa Rivers are the misfit streams of Olvios and revealed as juvenile streams and discharge to the Corinth gulf. Agiorgitikos River is the misfit stream of Rethis River and Seliandros River is the juvenile stream. Asopos, Nemeas and Rachiani Rives are the misfit streams of Inachos River and they also discharge to the Corinth gulf. Asopos River characterized as re-established stream. Physical factors such as tectonic regime (active and inactive faults), lithology, erosion and distance from the source influenced the three drainage systems evolution and could be influence them also in the future. The increase of human activities both in their southern parts and in the distal parts close to the coast could be change the physical evolution of the studied drainages, producing a new wind gap in the coastal area and a lake or a lagoon backwards of the coastal area, destroying villages and towns.

Environmental Problems

Energy ◽  
2012 ◽  
Author(s):  
José Goldemberg
Keyword(s):  
Environmental Impacts ◽  
Human Activities ◽  
Industrial Revolution ◽  
Environmental Problems ◽  
Short Period

Why are environmental problems so important today? In a short period (about 150 years after the Industrial Revolution), the environmental impacts, in terms of magnitude, of human activities became comparable to the ones caused by natural effects. Humans have become a force of geological...

scholarly journals Preliminary study of indonesia capital city relocation based on disaster mitigation principle with mental model approach

2020 ◽  
Vol 148 ◽  
pp. 06002
Author(s):  
Hanif Nur Azhar ◽  
Helmya Hilda Putri Fatima ◽  
Isna Nufussilma Tamas
Keyword(s):  
Human Activities ◽  
Mental Model ◽  
Disaster Mitigation ◽  
Capital City ◽  
Environmental Aspects ◽  
Social Culture ◽  
Natural Conditions ◽  
Framework Model ◽  
The Government ◽  
Model Approach

Jakarta (capital city of Indonesia) is threatened by potential disaster in the future. Furthermore, scientists predict that Jakarta will sink in 2050. Currently, northern Jakarta has sunk by 2.5 meters in a period of 10 years due to human activities along with natural conditions which causes disaster, such as land subsidence by infrastructure construction and excessively use of groundwater, poor drainage systems, and a constant sea level rise. Government of Indonesia also considers several effects of capital city relocation such as changes in the fields of economy, politics, defense, security, social, culture, and environment. This study examine environmental aspects considered in the capital city relocation, associated to disaster mitigation using a mental model approach. Environmental aspects as the main factors are from human activities which caused by decrease of natural carrying capacity and natural conditions itself that caused an increase of disaster vulnerability. Both of these aspects are elaborated to compile a study of capital city relocation based on the disaster prevention principle. The study through a mental framework model can assist the government and relevant stakeholders in the formulation of capital city relocation.Jakarta, as the capital city of Indonesia, several sectors has facing rapid growing development, particularly in the sector of trade, industry, transportation, real estate, and many others

scholarly journals Thermal structure and drainage system of a small valley glacier (Tellbreen, Svalbard), investigated by ground penetrating radar

2011 ◽  
Vol 5 (1) ◽  
pp. 139-149 ◽  
Author(s):  
K. Bælum ◽  
D. I. Benn
Keyword(s):  
Ground Penetrating Radar ◽  
Thermal Structure ◽  
Drainage System ◽  
High Arctic ◽  
Differential Gps ◽  
Glacier Surface ◽  
Digital Elevation ◽  
Drainage Channels ◽  
Ground Penetrating ◽  
Subglacial Drainage

Abstract. Proglacial icings accumulate in front of many High Arctic glaciers during the winter months, as water escapes from englacial or subglacial storage. Such icings have been interpreted as evidence for warm-based subglacial conditions, but several are now known to occur in front of cold-based glaciers. In this study, we investigate the drainage system of Tellbreen, a 3.5 km long glacier in central Spitsbergen, where a large proglacial icing develops each winter, to determine the location and geometry of storage elements. Digital elevation models (DEMs) of the glacier surface and bed were constructed using maps, differential GPS and ground penetrating radar (GPR). Rates of surface lowering indicate that the glacier has a long-term mass balance of −0.6 ± 0.2 m/year. Englacial and subglacial drainage channels were mapped using GPR, showing that Tellbreen has a diverse drainage system that is capable of storing, transporting and releasing water year round. In the upper part of the glacier, drainage is mainly via supraglacial channels. These transition downglacier into shallow englacial "cut and closure" channels, formed by the incision and roof closure of supraglacial channels. Below thin ice near the terminus, these channels reach the bed and contain stored water throughout the winter months. Even though no signs of temperate ice were detected and the bed is below pressure-melting point, Tellbreen has a surface-fed, channelized subglacial drainage system, which allows significant storage and delayed discharge.

Cd, Cr and Ni in drainage water from agricultural soils. Case study of South Alicante.

2020 ◽  
Author(s):  
José Navarro-Pedreño ◽  
María Belén Almendro-Candel ◽  
Ignacio Meléndez-Pastor ◽  
Ignacio Gómez-Lucas ◽  
Manuel M. Jordán ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Land Cover ◽  
Metal Pollution ◽  
Urban Areas ◽  
Agricultural Soils ◽  
Drainage System ◽  
Geographical Information ◽  
Land Cover Changes ◽  
Standard Methods ◽  
Drainage Channels

<p>Mediterranean coastal areas have been cultivated for long time. Wetlands areas situated near to the coast have been drainaged by using drainage channels. Heavy metals can be transferred from soils to the channels under agricultural management practices, especially under flood and furrow irrigation (the most important in the area studied). Anthropogenic inputs, including excessive use of agrochemicals and manure, in agricultural soils contribute to an increase of the content of some toxic heavy metals [1].</p><p>The agricultural area situated in the South of the province of Alicante has an important drainage system (avoiding to be a coastal wetland), which more than a thousand kilometers that allow the cultivation on calcareous soils (mainly Fluvisols). However, land uses have been changing and an important transformation of rural areas to residential areas have been occurred in the recent decades.</p><p>Under this situation, the presence of Cd, Cr and Ni in drainaged waters derived from infiltration from agricultural soils, and runoff from some urban areas, have been checked in the main drainage system (13 drainage channels) in order to detect possible influences of soil management in metal pollution. Water samples were taking along the channels in three to ten points of each channel, depending on the length, and metals were analyzed following standard methods [2]. At the same time, the land cover has been analyzed by using the last data from National Aerial Orthophotography Plan (available from the National Center of Geographical Information, Spain).</p><p>The most important result obtained was that the presence of Cd in the waters was under the limit of detection of 0.1 μg/L. This result reflected the absence of pollution sources of this metal from soils to these drainage channels.</p><p>Moreover, in the case of Cr, the values obtained were even below the reference values ​​for drinking water [3]. However, the major concentrations of this metal were between 6 to μg/L in only 4 channels. Ni, whose concentrations were lower than those for Cr, has values under 7 μg/L. Heavy metal pollution, at least in the elements analyzed, does not seem to be a serious problem in terms of the quality of these waters.</p><p>Although many land cover changes have occurred, most of the soils are dedicated to agriculture. On the other hand, no clear effects related to the proximity of urban areas to the drainage channels have been observed.</p><p><strong> </strong></p><p><strong>Keywords</strong></p><p>Heavy metals; irrigation; land cover changes, pollution, wetlands.</p><p> </p><p><strong>References</strong></p><p>[1] Navarro-Pedreño, J.; Almendro-Candel, M.B.; Gómez, I.; Jordan, MM; Bech, J.; Zorpas, A.A. (2018). Trace metal content and availability of essential metals in agricultural soils of Alicante (Spain). Sustainability 10, 4534.</p><p> [2] APHA, AWWA, WEF (2012). Standard Methods for the examination of water and wastewater. Ed. American Public Health Association, Washington.</p><p>[3] Real Decreto 314/2016, de 29 de julio, por el que se modifican el Real Decreto 140/2003, de 7 de febrero, por el que se establecen los criterios sanitarios de la calidad del agua de consumo humano.</p>

scholarly journals Borehole water-level variations and the structure of the subglacial hydrological system of Haut Glacier d’Arolla, Valais, Switzerland

1995 ◽  
Vol 41 (139) ◽  
pp. 572-583 ◽  
Author(s):  
B. P. Hubbard ◽  
M. J. Sharp ◽  
I. C. Willis ◽  
M. K. Nielsen ◽  
C. C. Smart
Keyword(s):  
Distributed System ◽  
Water Pressure ◽  
Drainage System ◽  
Late Summer ◽  
Variable Pressure ◽  
Sediment Layer ◽  
Drainage Channels ◽  
Hydrological System ◽  
Borehole Water ◽  
Water Level Variations

AbstractLate-summer subglacial water pressures have been measured in a dense array of boreholes in the ablation area of Haut Glacier d’Arolla, Switzerland. Interpolated surfaces of minimum diurnal water pressure and diurnal water-pressure variation suggest the presence of a subglacial channel within a more widespread, distributed drainage system. The channel flows along the centre of a variable pressure axis (VPA), some tens of metres wide, that is characterized by low minimum diurnal water pressures (frequently atmospheric) and high diurnal water-pressure variations. These characteristics are transitional over a lateral distance of c. 70 m to higher and more stable subglacial water pressures in the adjacent distributed system. Water-pressure variations recorded in boreholes located close to the centre of the VPA reflect the delivery of surface-derived meltwater to the glacier bed and result in a diurnally reversing, transverse hydraulic gradient that drives water out from the channel into the distributed system during the afternoon and back to the channel overnight. Subglacial observations suggest that such flow occurs through a vertically confined sediment layer. Borehole turbidity records indicate that the resulting diurnal water flows are responsible for the mobilization and transport of fine debris in suspension. Analysis of the propagation velocity and amplitude attenuation cf the diurnal pressure waves suggests that the hydraulic conductivity of the sediment layer decreases exponentially with distance from the channel, falling from c. 10−4 m s−1 at the channel boundary to c. 10−7 m s−1 70 m away. These apparent hydraulic conductivities are consistent with Darcian flow through clean sand and typical glacial till, respectively.We suggest that fine material is systematically flushed from basal sediments located adjacent to large, melt-season drainage channels beneath warm-based glaciers. This process may have important implications for patterns of glacier erosion, hydro-chemistry and dynamics.

scholarly journals REVIEW OF ROAD DRAINAGE SYSTEM (CASE STUDY: JALAN CIGOMBONG KM 16 - KM 23)

2019 ◽  
Vol 2 (2) ◽  
pp. 40-43
Author(s):  
Yahya Azura ◽  
Heny Purwanti ◽  
Wahyu Gendam Prakoso
Keyword(s):  
Return Period ◽  
Drainage System ◽  
Secondary Data ◽  
Road User ◽  
Primary Data ◽  
Drainage Channel ◽  
Flow Plan ◽  
The Road ◽  
Final Project ◽  
Drainage Channels

A good road drainage system is needed to ensure that road user activities are not disrupted due to rain puddles. The cause of inundation that occurs is land use change, there is no drainage channel, the channel is not well connected, the channel is closed due to widening of the road without considering drainage channels. Given this, research needs to be carried out on the condition of the existing drainage system as a material consideration for evaluating its feasibility and planning a drainage system that is able to overcome the inundation that occurs. Writing this final project refers to primary data and secondary data that already exist. The rainfall data came from the Climatology and Geophysics Meteorological Agency, Balai Besar Region II, Bogor Regency, which is the Darmaga huajn rainfall measurement station and the PUPR Binamarga Office of Bogor Regency. Meanwhile, to find out the dimensions of the existing drainage channels obtained by conducting surveys and direct observation to the field. Data analysis which was carried out was hydrological and hydraulics analysis. Hydrological analysis includes the analysis of rainfall frequency, determining the repeat period, calculating the concentration time, analyzing the rainfall intensity, and calculating the flow flow plan. Based on the results of hydrological analyzes, the hydraulics analysis is then performed, such as calculating the plan channel profile and calculating the height of the planned channel guard. From all of these analyzes, the results of the drainage study on the Cigombong KM 16 - KM 23 highway were carried out, that is, the entire capacity of the existing canals was not able to accommodate the planned flow discharge for a return period of 2 years 5 years 50 years. In addition, the results of the analyzes that have been carried out show that the rain that occurs during a certain period of time and a certain return period greatly affects the planned drainage channel profile and is due to the large amount of garbage in the channel which affects the reservoirs in the drainage that often occur frequently

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