scholarly journals Аnalysis of underflowing of residential areas and protection from urban groundwater

2021 ◽  
Vol 284 ◽  
pp. 01007
Author(s):  
Аlexandra Bakulina ◽  
Viktor Bilenko ◽  
Evgeny Rudomin ◽  
Sergey Borychev ◽  
Anastasiya Silkina ◽  
...  
Keyword(s):  
Drainage System ◽  
Hydrological Regime ◽  
Urban Groundwater ◽  
Drainage Water ◽  
Water Diversion ◽  
Residential Areas ◽  
Buried Structures ◽  
Urban Buildings ◽  
Basement Walls ◽  
Flooded Areas

The article discusses the main provisions for the protection of urban buildings from groundwater and the main causes of flooding of residential areas. Also known and proposed by us ways of solving the problem are analyzed. In recent years, intensive construction has been going on in areas that were previously considered unsuitable for construction: wetlands, floodplains of rivers and streams, ravines, etc. without deep study of changes in the hydrological regime of the adjacent territory. Activities are offered in flooded areas: elimination of the causes of flooding - channel lining; sealing of water pipes and collectors, installation of storm sewers; sealing of buried structures: basement walls, foundations; drainage - lowering groundwater to a safe depth. With our participation, a drainage system has been developed, with drainage water diversion to the floodplain of the Oka River.

Evaluation of tephra for removing phosphorus from dairy farm drainage waters

Soil Research ◽  
2008 ◽  
Vol 46 (7) ◽  
pp. 542 ◽  
Author(s):  
J. A. Hanly ◽  
M. J. Hedley ◽  
D. J. Horne
Keyword(s):  
Field Study ◽  
Removal Efficiency ◽  
Drainage System ◽  
Dairy Farm ◽  
Drainage Water ◽  
Control Treatment ◽  
Drainage Systems ◽  
P Adsorption ◽  
Drainage Waters ◽  
P Removal

Research was conducted in the Manawatu region, New Zealand, to investigate the ability of Papakai tephra to remove phosphorus (P) from dairy farm mole and pipe drainage waters. The capacity of this tephra to adsorb P was quantified in the laboratory using a series of column experiments and was further evaluated in a field study. In a column experiment, the P adsorption capabilities of 2 particle size factions (0.25–1, 1–2 mm) of Papakai tephra were compared with that of an Allophanic Soil (Patua soil) known to have high P adsorption properties. The experiment used a synthetic P influent solution (12 mg P/L) and a solution residence time in the columns of c. 35 min. By the end of the experiment, the 0.25–1 mm tephra removed an estimated 2.6 mg P/g tephra at an average P removal efficiency of 86%. The 1–2 mm tephra removed 1.6 mg P/g tephra at an average removal efficiency of 58%. In comparison, the Patua soil removed 3.1 mg P/g soil at a P removal efficiency of 86%. Although, the Patua soil was sieved to 1–2 mm, this size range consisted of aggregates of finer particles, which is likely to have contributed to this material having a higher P adsorbing capacity. A field study was established on a Pallic Soil, under grazed dairy pastures, to compare drainage water P concentrations from standard mole and pipe drainage systems (control) and drainage systems incorporating Papakai tephra. The 2 tephra treatments involved filling mole channels with 1–4 mm tephra (Mole-fill treatment) or filling the trench above intercepting drainage pipes with ‘as received’ tephra (Back-fill treatment). Over an entire winter drainage season, the quantity of total P (TP) lost from the control treatment drainage system was 0.30 kg P/ha. The average TP losses for the Mole-fill and the Back-fill treatments were 45% and 47% lower than the control treatment, respectively.

scholarly journals Assessment of Building Coverage and Environmental Quality of Residential Area in Nkpor Uno Idemili North Local Government Area, Anambra State, Nigeria

2021 ◽  
Vol 3 (1) ◽  
pp. 019-024
Author(s):  
Aronu Cecilia Nkechi ◽  
Ede Alison Okorie ◽  
Ilo Clementine Ifeyinwa ◽  
Okeke Monique Ugochinyere ◽  
Nwankwo Chidiebere Joy ◽  
...  
Keyword(s):  
Environmental Quality ◽  
Survey Design ◽  
Compliance Rate ◽  
Drainage System ◽  
Residential Area ◽  
Residential Areas ◽  
Free Air ◽  
Inadequate Ventilation ◽  
Air Space

This study was conducted to assess the building coverage and environmental quality of residential area in Nkpor Uno Idemili North L.G, Nigeria. The study employed a descriptive survey design to find out level of compliance of buildings to planning regulations. One hundred and eighty (180) were interviewed using a modified instrument (questionnaire). The data collected were coded into SPSS and analyzed with descriptive statistics. The results showed that 72(40%) reported inadequate setback as a major effect of over built buildings, 55(30.6%) reported inadequate free air space, 37(20.6%) said inadequate ventilation and lighting. Also, the nature of drainage system provided in residential areas; 76(42.2%) has no drainage system, 70(38.9%) has close drainage system. The building coverage of residential houses in the study area; 60(33.3%) has their building falls under 51-75% for over built, 48(26.7%) has their building falls under 76-100% for overbuilt. For the factors influencing the percentage of area built upon, 57(31.7%) has greed and no money to acquire a large plot of land, 47(26.0%) has no land space to built their desirable house. Then, non adherence to provision of adequate ventilation and lighting in the residential houses in the study area affects the dwellers’ health and such factors can promote communicable diseases. In conclusion, it was observed that the compliance rate was not encouraging because the planning regulations recorded very low compliance as include set–back from property boundaries; inadequate free air space; lost of aesthetic values, and inadequate ventilation and lighting. Therefore, government should embark on enforcement of land use plan, and strategic plans for various towns and villages to accommodate its utilities and facilities.

Vulnerability of coastal areas to increased aquifer saturation due to climate change

2021 ◽  
Author(s):  
Alexandre Gauvain ◽  
Ronan Abhervé ◽  
Jean-Raynald de Dreuzy ◽  
Luc Aquilina ◽  
Frédéric Gresselin
Keyword(s):  
Climate Change ◽  
Sea Level ◽  
Large Scale ◽  
Regional Scale ◽  
Drainage System ◽  
Hydrological Regime ◽  
Coastal Areas ◽  
Western Coast ◽  
Study Sites ◽  
The Impact

<p>Like in other relatively flat coastal areas, flooding by aquifer overflow is a recurring problem on the western coast of Normandy (France). Threats are expected to be enhanced by the rise of the sea level and to have critical consequences on the future development and management of the territory. The delineation of the increased saturation areas is a required step to assess the impact of climate change locally. Preliminary models showed that vulnerability does not result only from the sea side but also from the continental side through the modifications of the hydrological regime.</p><p>We investigate the processes controlling these coastal flooding phenomena by using hydrogeological models calibrated at large scale with an innovative method reproducing the hydrographic network. Reference study sites selected for their proven sensitivity to flooding have been used to validate the methodology and determine the influence of the different geomorphological configurations frequently encountered along the coastal line.</p><p>Hydrogeological models show that the rise of the sea level induces an irregular increase in coastal aquifer saturations extending up to several kilometers inland. Back-littoral channels traditionally used as a large-scale drainage system against high tides limits the propagation of aquifer saturation upstream, provided that channels are not dominantly under maritime influence. High seepage fed by increased recharge occurring in climatic extremes may extend the vulnerable areas and further limit the effectiveness of the drainage system. Local configurations are investigated to categorize the influence of the local geological and geomorphological structures and upscale it at the regional scale.</p>

Effect of controlled drainage and tillage on soil structure and tile drainage nitrate loss at the field scale

1998 ◽  
Vol 38 (4-5) ◽  
pp. 103-110 ◽  
Author(s):  
C. S. Tan ◽  
C. F. Drury ◽  
M. Soultani ◽  
I. J. van Wesenbeeck ◽  
H. Y. F. Ng ◽  
...  
Keyword(s):  
Soil Structure ◽  
Conservation Tillage ◽  
Drainage System ◽  
Conventional Tillage ◽  
Drainage Water ◽  
Tile Drainage ◽  
No Tillage ◽  
Controlled Drainage ◽  
Nitrate Loss ◽  
Free Drainage

Conservation tillage has become an attractive form of agricultural management practices for corn and soybean production on heavy textured soil in southern Ontario because of the potential for improving soil quality. A controlled drainage system combined with conservation tillage practices has also been reported to improve water quality. In Southwestern Ontario, field scale on farm demonstration sites were established in a paired watershed (no-tillage vs. conventional tillage) on clay loam soil to study the effect of tillage system on soil structure and water quality. The sites included controlled drainage and free drainage systems to monitor their effect on nitrate loss in the tile drainage water. Soil structure, organic matter content and water storage in the soil profile were improved with no-tillage (NT) compared to conventional tillage (CT). No-tillage also increased earthworm populations. No-tillage was found to have higher tile drainage volume and nitrate loss which were attributed to an increase in soil macropores from earthworm activity. The controlled drainage system (CD) reduced nitrate loss in tile drainage water by 14% on CT site and 25.5% on NT site compared to the corresponding free drainage system (DR) from May, 1995 to April 30, 1997. No-tillage farming practices are definitely enhanced by using a controlled drainage system for preventing excessive nitrate leaching through tile drainage. Average soybean yields for CT site were about 12 to 14% greater than the NT site in 1995 and 1996. However, drainage systems had very little effect on soybean yields in 1995 and 1996 due to extremely dry growing seasons.

scholarly journals Designing catchment area for water resources management in ITS campus

2018 ◽  
Vol 48 ◽  
pp. 05002
Author(s):  
Joni Hermana ◽  
Irhamah ◽  
Dian Saptarini ◽  
Tatas
Keyword(s):  
Surface Water ◽  
Water Resources ◽  
Ground Water ◽  
Catchment Area ◽  
Drainage System ◽  
Coastal Region ◽  
Building Blocks ◽  
Drainage Water ◽  
Environmental Damage ◽  
High Level

Institut Teknologi Sepuluh Nopember (ITS) Campus, with the area of 167.4 Ha, is located within Surabaya coastal region in the eastern part of Java Island. It has initial characteristic with wetlands and swamps ecosystem. As a science and technological university, with the main acitivities in teaching, experimental laboratory works, and student activities, ITS is, currently, using ± 49% of its total vast area as building blocks for supporting academic facilities. Being a campus in a coastal zone, the commonly main problems are high porous soil, brackish surface water, high level of ground water, an obstructed drainage tendency because of delicate slant, and low catchment capability. This paper provides an action program on how ITS manage water resources within campus area in order to suppress environmental damage. Many steps had been taken into account for water catchment role, for instance: maintaining the catchment area on the main ITS master plan, planning catchment pond, surface water stabilization by preventing ground water usage, interrupting drainage water flow as being directly discharged into the city drainage system, rain water harvesting, and also designing floating floor for buildings.

scholarly journals Antarctic subglacial lakes drain through sediment-floored canals: theory and model testing on real and idealized domains

2017 ◽  
Vol 11 (1) ◽  
pp. 381-405 ◽  
Author(s):  
Sasha P. Carter ◽  
Helen A. Fricker ◽  
Matthew R. Siegfried
Keyword(s):  
Distributed System ◽  
Process Model ◽  
Ice Sheet ◽  
Drainage System ◽  
Drainage Water ◽  
Process Models ◽  
Altimeter Data ◽  
Laser Altimeter ◽  
Ice Stream ◽  
Subglacial Lakes

Abstract. Over the past decade, satellite observations of ice surface height have revealed that active subglacial lake systems are widespread under the Antarctic Ice Sheet, including the ice streams. For some of these systems, additional observations of ice-stream motion have shown that lake activity can affect ice-stream dynamics. Despite all this new information, we still have insufficient understanding of the lake-drainage process to incorporate it into ice-sheet models. Process models for drainage of ice-dammed lakes based on conventional R-channels incised into the base of the ice through melting are unable to reproduce the timing and magnitude of drainage from Antarctic subglacial lakes estimated from satellite altimetry given the low hydraulic gradients along which such lakes drain. We have developed an alternative process model, in which channels are mechanically eroded into the underlying deformable subglacial sediment. When applied to the known active lakes of the Whillans–Mercer ice-stream system, the model successfully reproduced both the inferred magnitudes and recurrence intervals of lake-volume changes, derived from Ice, Cloud and land Elevation Satellite (ICESat) laser altimeter data for the period 2003–2009. Water pressures in our model changed as the flood evolved: during drainage, water pressures initially increased as water flowed out of the lake primarily via a distributed system, then decreased as the channelized system grew, establishing a pressure gradient that drew water away from the distributed system. This evolution of the drainage system can result in the observed internal variability of ice flow over time. If we are correct that active subglacial lakes drain through canals in the sediment, this mechanism also implies that active lakes are typically located in regions underlain by thick subglacial sediment, which may explain why they are not readily observed using radio-echo-sounding techniques.

scholarly journals Simulation studies of storm water drainage in Wrocław

2018 ◽  
Vol 44 ◽  
pp. 00129
Author(s):  
Monika Nowakowska
Keyword(s):  
Hydrodynamic Model ◽  
Drainage System ◽  
Storm Water ◽  
Simulation Studies ◽  
Water Drainage ◽  
Residential Areas ◽  
Residential Communities ◽  
Flood Volume ◽  
Maximum Water ◽  
Water Impoundment

In the paper were made the verification of the operation of a rainwater drainage system in the residential communities of Gaj and Tarnogaj in Wrocław, carried out in the hydrodynamic model using SWMM software. There were used two criterial precipitation: Euler’s model (with a frequency of C = 3 years) and the actual precipitation (C = 5 years). The criteria of overloading the system was the specific flood volume (SFV). For both cases of precipitation load of catchment, the simulated calculations showed the occurrence of outflows from the channels. Due to the value of SFV indicator (respectively: 19 m3/ha and 42,9 m3/ha), it was found that the tested system needs modernization, therefor acceptable instantaneous water level above the maximum water impoundment were more often than 1 per 3 years, which leads to overflows from channels for residential areas more often than allowed once every 20 years.

scholarly journals Antarctic subglacial lakes drain through sediment-floored canals: Theory and model testing on real and idealized domains

2016 ◽  
Author(s):  
Sasha P. Carter ◽  
Helen A. Fricker ◽  
Matthew R. Siegfried
Keyword(s):  
Distributed System ◽  
Process Model ◽  
Ice Sheet ◽  
Drainage System ◽  
Drainage Water ◽  
Process Models ◽  
Altimeter Data ◽  
Laser Altimeter ◽  
Ice Stream ◽  
Subglacial Lakes

Abstract. Over the past decade, satellite observations of ice surface height have revealed that active subglacial lake systems are widespread under the Antarctic ice sheet, including the ice streams. For some of these systems, additional observations of ice stream motion have shown that lake activity can affect ice-stream dynamics. Despite all this new information, we still have insufficient understanding of the lake-drainage process to incorporate it into ice sheet models. Process models for drainage of ice-dammed lakes based on conventional "R-channels" incised into the base of the ice through melting are unable to reproduce the timing and magnitude of drainage from Antarctic subglacial lakes estimated from satellite altimetry given the low hydraulic gradients along which such lakes drain. We have developed an alternative process model, in which channels are mechanically eroded into the underlying deformable subglacial sediment. When applied to the known active lakes of the Whillans/Mercer ice stream system, the model successfully reproduced both the inferred magnitudes and recurrence intervals of lake volume changes, derived from Ice, Cloud and land Elevation Satellite (ICESat) laser altimeter data for the period 2003–2009. Water pressures in our model changed as the flood evolved: during drainage, water pressures initially increased as water flowed out of the lake primarily via a distributed system, then decreased as the channelized system grew, establishing a pressure gradient that drew water away from the distributed system. This evolution of the drainage system can result in the observed internal variability of ice flow over time. If we are correct that active subglacial lakes drain through canals in the sediment, this mechanism also implies that active lakes are typically located in regions underlain by thick subglacial sediment, which may explain why they are not readily observed using radio-echo sounding techniques.

scholarly journals Design of Rainwater Harvesting District at Kebon Melati Tanah Abang

2017 ◽  
Vol 2 (1) ◽  
pp. 77-88
Author(s):  
Rendy ◽  
Santoni
Keyword(s):  
Design Theory ◽  
Rainwater Harvesting ◽  
Drainage System ◽  
Urban System ◽  
Residential Areas ◽  
Dense Population ◽  
Urban District ◽  
Open Spaces ◽  
Collecting Techniques ◽  
Retention Basins

Jakarta’s dense population has caused a disorder in the urban system by negatively impacting its streams. Therefore, this research aims to find out the urban district design criterias with rainwater harvesting system and how to implement them in residential areas of Kebon Melati, Tanah Abang. Data collecting techniques used in this research include literature studies, field observation, and interviews. The proposed solution to Jakarta’s rainwater problems is to design a district which incorporates the four potential urban design theory applications into it. The first theory is about land use related to storage and drainage system. The second theory is about vehicle circulation and pedestrian paths related to roadblock gaps and permeable materials. The third theory is about building mass and shape related to catchment area, conveyance, and green roof. The last theory is about open spaces related to water retention basins. The goal of this urban district design is to develop and decrease the speed of rainwater flow in Kebon Melati.

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