Assessment of evaporation and salt accumulation in bare soil: Constant shallow water table depth with saline ground water

Scientific Research and Essays

Jalili¹ 

关键词:  ;    Evaporation;    salinity;    water table.;   

DOI  :  10.5897/SRE11.509

学科分类：社会科学、人文和艺术（综合）

来源: Academic Journals

【 摘 要 】

Salinization of soil is a major problem in arid and semi-arid regions with saline shallow water table. This is influenced by climate, soil type, crop, irrigation water quality and management practice, depth of water table and salinity of the water table. The objective of this study was the assessment of evaporation and salinization of bare soil profile with various water table depths including 300, 500 and 800 mm by saline groundwater (3 g NaCl/L + 3.5 g CaCl2/L). In this research we were monitoring amount of evaporation from bare soil, and observing profiles of soil water and salinity over periods of up to 80 days. The experiments started on April, 10th, 2010. Results showed that, salts mainly accumulated in the soil surface and volume of evaporation from bare soil in lower water table depth (D = 300 mm) is greater than other lysimeters (D = 500 and 800 mm), and salt accumulation in this lysimeter was higher than others. After 80 days, amount of salinity (ECe) in soil surface was 83.84, 65.76 and 24.05 dS/m, for D = 300, 500 and 800 mm, respectively.

【 授权许可】

CC BY