Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: pedotransfer

Sortuj według:

Ogranicz wyniki do:

Pedotransfer functions for predicting tropical soil water retention: A case study in upper Citarum watershed, Indonesia

Mulyono Asep, Suriadikusumah Abraham, Harryanto Rachmat, Djuwansah Muhammad R.

Journal of Water and Land Development

2020

no. 45

76--85

Tropical regions such as Java, Indonesia, still lack publication of soil water retention (SWR) information, particularly at upper Citarum watershed. The SWR is one of the critical elements in water storage and movement in the soil and very important to solve ecological and environmental problems. However, getting the access requires a lot of laboratory measurement that is time-consuming and expensive. Therefore, utilizing pedotransfer functions (PTFs) to estimate the water in the soil is needed. This study aims to define soil properties related to the SWR and to evaluate the performance of existing PTFs in predicting SWR. The study was carried out at agroforestry land system soil at upper Citarum watershed, Indonesia. Ten point and two continuous existing PTFs developed for tropical regions were applied in this study. Pearson's correlation (r), mean error (ME), root mean square error (RMSE), and modelling efficiency (EF) were used for evaluation. Cation exchange capacity (CEC), organic carbon (OC), bulk density (BD), and clay were considered as potential soil properties for soil water retention prediction. The performance of PTFs by MINASNY, HARTEMINK [2011] at matric potential of –10 kPa and BOTULA [2013] at matric potential of –33 kPa and –1500 kPa were recommended for point PTFs, while PTFs by HODNETT, TOMASELLA [2002] was for continuous PTFs in predicting SWR. The accuracy of the point PTFs is almost better than the continuous PTFs in predicting SWR in agroforestry land system soil at upper Citarum watershed, Indonesia.

Analiza porównawcza wybranych funkcji pedotransferu do określenia właściwości retencyjnych gruntów na przykładzie utworów pochodzących z obszarów osuwiskowych

Zydroń T., Zaleski T.

Inżynieria Morska i Geotechnika

2013

nr 1

36--42

Wyniki obliczeń charakterystyki retencyjnej szesnastu gruntów za pomocą funkcji pedotransferu zaproponowanych przez różnych autorów. Porównanie wyników obliczeń z wynikami pomiarów laboratoryjnych przeprowadzonych metodą płyt porowatych w komorach ciśnieniowych w zakresie ciśnienia ssania 1 ÷ 15848 cm. Wykazano stosunkowo dobre dopasowanie wyników obliczeń do danych pomiarowych stosując model Aubertina i in., Arya-Paris oraz Vereeckena i in. Pierwszy z modeli zawyża, a pozostałe zaniżają wartości wilgotności objętościowej.

Results of calculations of Soil-Water-Characteristic-Curves for sixteen soils using pedotransfer functions proposed by various authors. The comparison of results of calculations with results of tests using pressure plate apparatus in the suction range of 1 ÷ 5848 cm. The relatively good prediction of volumetric water content was obtained using Aubertin et al., Arya-Paris and Vereecken et al. models. The first one slightly overestimates and the other ones underestimate the values of volumetric water content.