scholarly journals Study on the Evaluation of Run-off Control Effect of Rainwater Infiltration System that has Researched in Akisima-Tsutsujigaoka Heights Housing Complex since 1981, over passed 20 years

2003 ◽  
Vol 11 ◽  
pp. 87-92
Author(s):  
Ryotaro HAYASHI ◽  
Yoshikazu SHIMADA ◽  
Yoshiyuki MORIKAMI
Keyword(s):  
Control Effect ◽  
Rainwater Infiltration ◽  
Run Off ◽  
Housing Complex

scholarly journals Effect of Fertilizer Application on Groudwater Quality at an Oil Palm Plantation

2017 ◽  
Vol 2 (1) ◽  
pp. 67
Author(s):  
Muhammad edwin syahputra Lubis
Keyword(s):  
Groundwater Quality ◽  
Oil Palm ◽  
Fertilizer Application ◽  
Optimum Growth ◽  
Oil Palm Plantation ◽  
Nitrate N ◽  
Run Off ◽  
Ammonium N ◽  
Housing Complex

<p><em>Oil palm plantations need fertilizers for optimum growth and production. However, excessive use of fertilizers can lead to pollution of groundwater. For this reason, a study was carried out to investigate groundwater quality of an oil palm ecosystem, which involved the measurement of 9-point monitor wells and run-off. This research was conducted in Kabun-Aliantan (N: 0002.925’ E: 100049.977’). Tandun, Riau-Indonesia. The location points of the monitored wells in this study comprised a young oil palm area (P1), an adult oil palm area near Lau river (P2), a housing complex at oil palm plantation (P3), an adult oil palm area at Marihat, Block A (P4), a housing 1 at the sub-district town (P5), a housing 2 at the sub-district town (P6), a cocoa area (P7), a village housing (P8), at the side of Lau river (PR), and a run-off in a micro catchment (N: 00027.936’ E: 100049, 977’). The parameters analyzed in the water samples were pH, nitrate-N (NO3</em><em>-</em><em>N), nitrite-N (NO2</em><em>-</em><em>N), ammonium-N (NH4-N), phosphate (P), potassium (K), calcium (Ca) and magnesium (Mg). </em></p><p><em>In general, pH, NO3</em><em>-</em><em>N, NO2</em><em>-</em><em>N, NH4-N, P, K, Ca and Mg increased after fertilizer application and decreased with time. All levels of parameters were lower than the WHO standard for drinking water. This study showed that the fertilizers on the oil palm plantation did not pollute the groundwater quality. However, groundwater pollution was found to be caused by residential wastes, such as the use of detergents and other human activities.</em></p>

Investigation of Rainwater Infiltration with Emphasis on Hydro-geological as well as Hydrological Conditions

2017 ◽  
Author(s):  
Martina Zeleňáková ◽  
Gabriela Hudáková ◽  
Ladislav Tometz ◽  
Helena Hlavatá
Keyword(s):  
Urban Areas ◽  
Financial Burden ◽  
Waste Water Treatment ◽  
The Body ◽  
Water Infiltration ◽  
Urban Drainage ◽  
Infiltration Capacity ◽  
Rainwater Infiltration ◽  
Run Off ◽  
The Status

Urban drainage has become one of the most important aspects of urban development. Ensuring long-term functioning of sewer systems and waste-water treatment plants is associated with constantly rising costs, and it is clear nowadays that the contemporary method of urban drainage cannot possibly be implemented worldwide because of the financial burden. The existing method of urban drainage continues to threaten the status of water flow and water sources. Urban hydrology has evolved to improve the way urban run-off is managed for flood protection, public health and environmental protection. The essence of the future solution resides in finding an acceptable compromise or an alternative solution for rainwater drainage from urban areas. The content of this paper is research focused on the infiltration of water from surface run-off and comparison of ground testing, laboratory analysis and numerical analysis of filtration coefficient. The foundation for improving the effectiveness of urban drainage will be created through the proposal and comparison of infiltration conditions. The topic of the paper emerged because of insufficient information about infiltration systems in the Slovak technical regulations and the lack of support for water infiltration from surface run-off. This paper points out the fundamentals, principles and development of proposals for infiltration facilities. The aim of the paper was to expand the body of scientific knowledge in research and solutions for infiltration of water from surface run-off with emphasis on the infiltration capacity of the selected area and intensity of precipitation.

scholarly journals Profitability improvement of a reservoir power station based on virtual reservoir bidding

Water Policy ◽  
2021 ◽  
Author(s):  
Yanmei Zhu ◽  
Weibin Huang ◽  
Shijun Chen ◽  
Guangwen Ma ◽  
Yue Liu
Keyword(s):  
Power System ◽  
Benefit Sharing ◽  
Urgent Problem ◽  
Control Effect ◽  
Power Station ◽  
Run Off ◽  
Regulation Function ◽  
Seasonal Regulation ◽  
Bidding Process ◽  
Run Of River

Abstract Compared with a run-of-river power station, a reservoir power station (RPS), with the capacity of a seasonal regulation function and more, has the unique and irreplaceable attributes of its role in the power grid and society at large. However, under the current power system and market environment in China, these attributes cannot be effectively utilised, resulting in heavy losses to enterprises. It is inevitable for RPSs to participate in the market; therefore, how to improve the profitability of RPS enterprises has become an urgent problem requiring a solution. Based on the control effect on run-off of RPS in a river basin, a new cascade hydropower bidding method and the associated bidding process are proposed. The market entities of the new bidding method are composed of cascade hydropower joints with the RPS as the boundary. The bidding unit benefit-sharing mechanism is constructed, and the accounting method for the benefit-sharing price of the RPS is established, which finally achieves the goal of improving the profitability of the RPS enterprise.

STRUKTUR BASIS DATA SISTEM INFORMASI MANAJEMEN ALOKASI LAHAN DALAM PENATAAN RUANG

2019 ◽  
Vol 3 ◽  
pp. 385
Author(s):  
Dinar Dwi Anugerah Putranto ◽  
Agus Lestari Yuono ◽  
Sarino Sarino ◽  
IC Juliana
Keyword(s):  
Run Off

Perubahan Pemanfaatan lahan yang begitu cepat, telah merubah pola-pola pengaliran permukaan (run-off) pada wilayah sub sistem sungai yang ada di daerah perkotaan. Permasalahan limpasan air permukaan dan genangan (storm watter), dipengaruhi oleh beberapa faktor, seperti masalah okupasi bantaran sungai, penimbunan rawa yang tidak sesuai, pengaruh pasang-surut sungai, yang mempengaruhi kapasitas sub sistem sungai pada wilayah bersangkutan (Putranto, 2016). Penelitian ini akan membahas isu spasial pada sistem aliran air permukaan dalam perencanaan tata ruang wilayah kota dengan menekankan integrasi aliran air permukaan (run-off) dan manajemen alokasi lahan. Metode yang digunakan dalam penelitian ini adalah melakukan analisis secara spasial menggunakan semua parameter Run-off dalam struktur database dengan memanfaatkan interface Sistem Informasi Manajemen Alokasi Lahan (SIMAL) yang dibangun untuk menguji besarnya puncak banjir menggunakan metode HSS Nakayatsu, dengan studi kasus sub sistem sungai Jakabaring, di Kota Palembang. Hasil yang diperoleh mampu melihat alih fungsi lahan rawa, yang dimanfaatkan untuk Kawasan Palembang Sport City dalam menghadapi Asian Games 2018 di Kota Palembang, telah menyebabkan genangan banjir pada wilayah sungai Kedukan, bagian dari Sub DAS Jakabaring, Kawasan Seberang Ulu, Kota Palembang, Indonesia. Berdasarkan Analisis menggunakan model hydrograft satuan Nakayatsu, terjadinya puncak banjir akan terjadi saat curah hujan mencapai lebih dari 120 mm/jam yang menyebabkan debit sungai kedukan mencapai hingga 400m3/det. Pembuatan danau buatan sebagai kolam retensi dan sekaligus sebagai venue olah raga, belum mampu mengurangi tinggi genangan yang terjadi sekitar 0,6 – 1,2 m dpl.

Impact of Corporate Governance on the Cash Holding of the Firms: An Empirical Study of Indian Manufacturing Sector

GIS Business ◽  
2017 ◽  
Vol 12 (4) ◽  
pp. 47-52
Author(s):  
Karam Pal Narwal ◽  
Sonia Jindal
Keyword(s):  
Corporate Governance ◽  
Audit Committee ◽  
Manufacturing Sector ◽  
Control Variable ◽  
Cash Holding ◽  
Executive Directors ◽  
Control Effect ◽  
Board Size ◽  
Indian Manufacturing Sector ◽  
The Impact

The paper empirically examines the impact of corporate governance on the cash holding of the firms. The components of corporate governance are measured by board size, board meeting, audit committee members, directors remuneration and non executive directors and the cash holding is measured with the log of average cash and size is taken as control variable for the control effect on the dependent variables. Moreover, correlation and panel regression model were employed to examine the relationship between the corporate governance and cash holding. Empirical data was collected from 96 firms over the period of 2004-05 to 2013-14. The results show that directors remuneration and the number of audit committee members positively influence the cash holding and the board size also positively influences the cash holding whereas, the non executive directors and the board meetings do not play any role in enhancing the cash holding.

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