EVALUATION AND MAPPING OF SOIL SALINITY HAZARD IN RAMHORMOZ AREA (KHUZESTAN) USING DISJUNCTIVE KRIGING

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MOHAMMADI JAHANGARD

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Journal: Iran Agricultural Research Year:2000 | Volume:19 | Issue:2 Page(s): 83-98

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Title

EVALUATION AND MAPPING OF SOIL SALINITY HAZARD IN RAMHORMOZ AREA (KHUZESTAN) USING DISJUNCTIVE KRIGING

Author(s)

MOHAMMADI JAHANGARD | Issue Writer Certificate

Keywords

DISJUNCTIVE KRIGINGQ3

GEOSTATICSQ3

MAPPINGQ3

SOIL SALINITYQ3

SPATIAL VARIABILITYQ3

Abstract

To evaluate the SOIL SALINITY hazard in Ramhormoz area located in Khuzestan province, DISJUNCTIVE KRIGING was used. Assessment was made through a series of salinity risk map. DISJUNCTIVE KRIGING is a non-linear geostatistical estimation technique which provides minimum estimation variance. Moreover, it allows calculating the conditional probability that some critical threshold is exceeded. The results of MAPPING SOIL SALINITY at depth 0-50 cm indicate that about 45% of the interpolated sites show an EC higher than 16 dS m-1. About 18% of the whole area was interpolated with an EC less than 4 dS m-1 the lowest EC values were found mainly in the areas around and along the river occupied by soils of river alluvial origins, while, the areas with very high EC values are the places situated in the lowlands where two patches of marshes exist. To estimate the conditional probability some salinization thresholds, critical thresholds of 2, 4 and 8 dS m-1, were selected. Considering the threshold value of 2 dS m-1, almost the entire area shows the conditional probabilities of more than 0.5. It indicates that there is a severe salinity limitation in the entire area. Assuming that a probability level of 0.6 is acceptable, for about 40%, of the entire area the EC was found to be more than 4 dS m-1.

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APA: Copy

MOHAMMADI, JAHANGARD. (2000). EVALUATION AND MAPPING OF SOIL SALINITY HAZARD IN RAMHORMOZ AREA (KHUZESTAN) USING DISJUNCTIVE KRIGING. IRAN AGRICULTURAL RESEARCH, 19(2), 83-98. SID. https://sid.ir/paper/16151/en

Vancouver: Copy

MOHAMMADI JAHANGARD. EVALUATION AND MAPPING OF SOIL SALINITY HAZARD IN RAMHORMOZ AREA (KHUZESTAN) USING DISJUNCTIVE KRIGING. IRAN AGRICULTURAL RESEARCH[Internet]. 2000;19(2):83-98. Available from: https://sid.ir/paper/16151/en

IEEE: Copy

JAHANGARD MOHAMMADI, “EVALUATION AND MAPPING OF SOIL SALINITY HAZARD IN RAMHORMOZ AREA (KHUZESTAN) USING DISJUNCTIVE KRIGING,” IRAN AGRICULTURAL RESEARCH, vol. 19, no. 2, pp. 83–98, 2000, [Online]. Available: https://sid.ir/paper/16151/en

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