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008 160398 th eng
035 _a.b10165320
099 9 _aAIT Thesis no. 1065
100 1 _aJan, Geow Ching
245 1 0 _aConservation measures and soil loss factors evaluation on cultivated slopeland of Taiwan
260 _aBangkok :
_bAsian Institute of Technology,
_c1978
300 _a67 p.
490 1 _aThesis ;
_vno. 1065
500 _aA thesis submitted in partial fulfilment of the requirements for the Degree of Master of Engineering at the Asian Institute of Technology, Bangkok, Thailand.
502 _aThesis (M.Eng.) - Asian Institute of Technology, 1978
520 _aThis study deals with conservation measures on cultivated slope land of Taiwan and evaluation of soil loss equation factors. Background and principal conservation practices of this area were introduced before the study. Conservation practices was compared by means of efficiency. Bench terrace functions better than hillside ditch in soil and water control, under no cover condition. But hillside ditche are better than bench terrace after completely covered by bahia grass on slope areas. Universal soil loss equation was introduced with all the relevant factors. It is A = R K LS C P. An Application example of this equation in Taiwan was shown. b Rainfall factor (R-index) was evaluated by the equation R = a Rab. R is the R-index, of a station already calculated and Ra is monthly rainfall, a, b are parameters. The R-index equation of Pingtung areas is R = 0.0069 Ra 1.74 and that of Taichung areas is R = 0. 0049 Ra 1.7653 The R-·index of sourrounding rainfall station can be evaluated by these equation. An R=index iso-map of these areas is exhibited in Fig. 5.4. Soil erodibility factor K for slope land of Taiwan was evaluated by a soil erodibility nomograph, which had been modified according to soil mechanical analysis data. Finally, a slopeland soil conservation system consideration with a diagrammatic model was worked out. The factors of rainfall, soil erodibility topograph, creping system and control practices set the boundaries of the system to be synthetized. This gives a basic information for simulation system.
650 0 _aSoil conservation
_xResearch
_xTaiwan
700 1 _aI, Fude,
_eChairperson
700 1 _aApichart Anukularm phai,
_eExamination Committee
700 1 _aSelvalingam, Selvadore,
_eExamination Committee
710 2 _aGovernment of Republic of China,
_eScholarship Donor
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. 1065
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B22847
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