China
Africa
Explore chapters and articles related to this topic
Wetland Mapping Methods and Techniques Using Multisensor, Multiresolution Remote Sensing: Successes and Challenges
Published in Prasad S. Thenkabail, Remote Sensing Handbook, 2015
D.R. Mishra, Shuvankar Ghosh, C. Hladik, Jessica L. O’Connell, H.J. Cho
AG GBM data were collected by destructive sampling from a 0.09 m2 (1 ft2) subplot within each study plot using a PVC frame and clippers (Figure 8.9). Biomass samples were sorted to separate the live biomass from dead and oven dried at 65°C overnight (~24 h) to get rid of moisture. The dry weight was recorded using a standard measuring balance. Precautions were taken to avoid moisture absorption by the dried GBM during dry weight measurement. The dry GBM weights (g/ft2) were then rescaled to g/m2.
Sub-Surface Tomography Applications
Published in Blaunstein Nathan, Yakubov Vladimir, Electromagnetic and Acoustic Wave Tomography, 2018
Vladimir Yakubov, Sergey Shipilov, Andrey Klokov, Nathan Blaunstein
The soil moisture in the samples was measured by the dry-and-wet weight method, in which the water content is calculated as the ratio of the weight of water in the sample to the dry weight of the sample. In this case, samples weighing from 10 to 25 g were dried in an oven at 105°С for 3 h and then weighed. Then, they were oven dried once again for 3 h and weighed once more. The weight difference between weighings was 0.004 g on average, resulting in 0.1% error in the moisture measurement.
Landfill Leachate Used as Irrigation Water on Landfill Sites During Dry Seasons
Published in M.H. Wong, J.W.C. Wong, A.J.M. Baker, Remediation and Management of Degraded Lands, 2018
A depth of 10 cm of surface soil was discarded using a spade, and soil samples at 10 to 20 cm depth were collected with a soil sampler (stainless steel tube: 1 m in length and 10 cm in diameter) and placed into plastic boxes and sealed immediately. After fresh weight determination, the samples were oven-dried at 100°C for dry weight measurement. Five samples from each treatment were collected.
Development of native forest species of the Atlantic forest in soil contaminated with hormonal herbicides
Published in International Journal of Phytoremediation, 2019
Mariana Generoso Ferreira, Gabriela Madureira Barroso, Vitor Antunes M. da Costa, Bárbara Monteiro de Castro e Castro, José Cola Zanuncio, Israel Marinho Pereira, Evander Alves Ferreira, Dayana Maria Teodoro Francino, José Barbosa dos Santos
Emergency speed index was calculated with the total number of seedlings emerged daily, divided by that of days between sowing and emergence (Maguire 1962). The height was determined by measuring the seedling lap to the apex with a graduated ruler. Intoxication was evaluated in the aerial seedling part, during each species collection, assigning grades from 0 to 100%, with 0 meaning no symptom and 100% seedling death (SBCPD 1995). The roots were immersed in a beaker with a fixed water volume and its volume measured by the water displacement from the initial one. The stem diameter was obtained with digital calibrated caliper. The aerial and root dry mass were evaluated in plant material of the seedlings placed in paper bags and dehydrated in a greenhouse with forced air circulation (60 °C) for 48 hours. Dry weight was determined on a precision scale. The leaf area was determined with its digitized photographs with the aid of the Image K software and the leaf numbers of the forest species counted manually.
Bioaccumulation and rhizofiltration potential of Pistia stratiotes L. for mitigating water pollution in the Egyptian wetlands
Published in International Journal of Phytoremediation, 2018
Tarek M. Galal, Ebrahem M. Eid, Mohammed A. Dakhil, Loutfy M. Hassan
The sampling process was carried out through monthly selecting 9 quadrats (0.5 × 0.5 m) during the period from May (2013) to February (2014). Quadrats were distributed equally along three sites in Al-Sero Drain at Giza Province (Lat. 30° 03′19“N, Long. 31°08′19”E) in homogeneous and monospecific P. stratiotes stands. This drain recieves agricultural and municipal wastewater as well as some industrial wastes such as dye and pigments manufacture. Plant individuals within each quadrat were collected and transferred to the laboratory in plastic bags. Plant materials, from each quadrat, were separated into above-water shoots and below-water roots (including stolons). Dry weight was estimated after oven drying at 85°C till constant weight. All average biomass values were determined monthly as g dry weight per square meter (g DW m−2).
Flow balance optimization and fluid removal accuracy with the Quanta SC+ hemodialysis system
Published in Expert Review of Medical Devices, 2020
Clive Buckberry, Nicholas Hoenich, Paul Komenda, Mark Wallace, John E Milad
Thus, removal of fluid gained between treatments and the ability to accurately return a patient to their prescribed dry weight is a prerequisite of dialysis treatment. Dry weight, or the optimum post dialysis weight, is the weight at which all or most of the excess body fluid has been removed. Other definitions of dry weight have been proposed: one defines dry weight as the lowest tolerated post dialysis weight achieved via gradual change at which there are minimal signs or symptoms of hypovolemia or hypervolemia [14]. Another defines it as the body weight at the end of a dialysis treatment at which the patient can remain normotensive until the next dialysis treatment despite the retention of saline and ideally without the use of antihypertensive medications.