| Summary: | 碩士 === 國立屏東科技大學 === 土木工程系所 === 103 === This study was conducted in the Pingtung County Farm Bandung artificial using test on groundwater seepage influence for artificial groundwater recharge,The study was divided into three phases: the first test was naturol groundwater, recharge through local climate and growing conditions was to observe the natural form of vegetation species . Let the original plants they were flooded, major grasses were and after 60 days it was observed that still alive.Remaining goosegrass wild amaranth And , direct infiltration tests were carried and calculations on the effect of vegetation on infiltration rate of recharge pool was noted. The second stage is an indoor test , grasses Goosegrass (Bahia grass) and wild amaranth (Amaranthus viridis Linn) were selected as vegetation root Xicao research, which after growth, the distribution of different grass roots were observed, in order to facilitate comparison permeability coefficient, calculated by the amount of penetration, explore the relationship between density and the benefit to groundwater recharge. The third stage is the root tomography analysis, further observ ation on the development of plant roots by using computer tomography technology, " Computer Tomography ", also known as (CT) , it is a diagnostic imaging examination, nornally was used in the medical field. observe the development of plant roots.
In the first phase of the feasibility study, most non-aquatic plants wilted and died within seven days.After seven days, the remaining plants were uswd for infiltration experimental analysis.Experimental results showed,after eight hours of infiltration test, goose grass stems averaged 158.5 ml / hr and wild amaranth average of 30.0 ml / hrinfiltration. The second phase experiment showed that, a week after the plant to died rot performed with infiltration experiment.The results showed eight hours after end of infiltration test, goose grass stems averaged 70.5 ml / hr, wild amaranth average 21.0 ml / hr. Non-aquatic plants died two weeks and their rot bodies clogging the poresed of bottom soil particles,which caused obstruction of recharge cell infiltration. Experimental results showed eight hours after test, the average infiltration ratefor goose grass stems was 49.0 ml / hr and wild amaranth averaged 25.0 ml / hr. Since the body of the plant rotted roots blocked sidebar pool of fine soil particles hole,if resulting in infiltration pond obstruction, and showed immediate impact on recharge efficiency. In order to observe the development of plant roots, the third phase used computer tomography imaging, Injection of iodine developer on CT. cross-sectional images on wild amaram can be used to observe root development.
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