Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 Journal of Water and Land Development

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

El-Nino effect on reservoir capacity reliability: Case study of Sumi dam, Sumbawa Island, Indonesia

Andawayanti Ussy, Yasa I. Wayan, Bisri Mohammad, Sholichin Mochamad, Sulianto

Journal of Water and Land Development

2020

no. 44

1--7

Reservoirs have a very important function in providing multi-sector water requirements. In the future, reservoirs not only serve to store and available water can also be used as disaster mitigation instruments. The completeness of hydrological measurements in reservoirs can be expanded more widely for climate change mitigation. The reliability of the reservoir capacity varies greatly depending on the El-Nino character that occurs among them El-Nino is weak, moderate, strong and very strong. The El-Nino characteristic is very influential on the period of water availability, the increase of evaporation capacity and decrease of reservoir capacity. Analysis of the reliability of the reservoir volume due to El-Nino using the Weibull equation. The deficit reservoir was calculated using the concept of water balance in the reservoir that is the relationship between inflow, outflow, and change of storage at the same time. Based on the results of the analysis showed that the evaporation increase and the decrease of reservoir capacity had a different pattern that is when the evaporation capacity started to increase at the same time the reservoir capacity decreased significantly. The correlation coefficient between evaporation capacity increase and decrease of reservoir water capacity are consecutively –0.828, –0.636, and –0.777 for El- Nino weak, moderate and very strong respectively. At the reservoir capacity reliability of 50% reservoir has a significant deficit. When weak El-Nino the deficit is 2.30∙106 m3, moderate: 6.58∙106 m3, and very strong 8.85∙106 m3.

Effectivity test of an eco-friendly sediment trap model as a strategy to control erosion on agricultural land

Haribowo Riyanto, Andawayanti Ussy, Lufira Rahmah Dara

Journal of Water and Land Development

2019

no. 42

76--82

A sediment trap with bamboo materials can be utilized as one alternative of eco-friendly technology to reduce the erosion that occurred on agricultural land. This study aims to determine the most efficient form of that sediment trap in the field. Location study is in the Tulungrejo Village, Batu, Indonesia, which has andosol soil type and 35 cases of a landslide in 2013. Three forms of sediment traps were used (square, trapezoidal, and stratified type) with the purpose to find the most effective form. It is obtained that the most effective sediment trap is a stratified form with the 31.91% effectiveness or able to withstand sediment of 25.02 kg, while the adequate number is two pieces with the ability to withstand the most considerable sediment of (91.70%). Therefore this stratified form of sediment traps is effective in erosion prevention on agricultural land in the study area. For further development, it is required to test out the variations of the contents in a broader area with a more varied level of the slope.

Pułapka z bambusu do wychwytywania osadów może być używana na terenach rolniczych do ograniczenia erozji jako jedna z alternatywnych technologii przyjaznych środowisku. Miejscem badań była wieś Tulungrejo, Batu w Indonezji. W badaniach terenowych podjęto próbę określenia najbardziej efektywnej pułapki spośród trzech form: kwadratowej, trapezoidalnej i warstwowej. Najlepsza okazała się pułapka warstwowa o skuteczności 31,91%, zdolna zatrzymać osad o masie 25,02 kg. Zestawienie dwóch takich pułapek dało skuteczność 91,70%. Warstwowa forma pułapek jest więc skuteczna w zapobieganiu erozji z terenów rolniczych na obszarze prowadzonych badań. W przyszłych pracach należy przeprowadzić podobne testy na innych obszarach o bardziej zróżnicowanej rzeźbie terenu.