Abstract: Based on the fixed-spot observation, this paper analyzed the effects of soil th icknesses on the spatiotemporal pattern of soil moisture in the Wulongchi catchm ent of Danjiangkou, China. The soil moisture content increased soon after precip itation events, followed by a decline as the soil dried down, whilst its spatial heterogeneity exhibited an opposite pattern. The profile-averaged soil moistur e content differed significantly with soil thickness. The soil with a thickness of 20 cm had lower profile-averaged moisture content whose variation trend was s imilar to that of precipitation and varied obviously among seasons; medium thick ness (20〖KG-*2〗-〖KG-*7〗40 cm) soil had medium level of profile-averaged moi sture content whose seasonal variation was moderately and affected by the charac teristics of precipitation; while the soil with a thicknesses of >40 cm had high er profile-averaged moisture content whose seasonal variation was relatively sm all. The profile distribution pattern of soil moisture was determined by the int egrated effects of precipitation, evapotranspiration, and leakage, exhibiting in creasing-type at semi-humid stage, waving-type at humid stage, and both of th e two types at arid stage. There was a significant positive correlation be tween profile-averaged soil moisture content and soil thickness, and the correl ation coefficient was 0630〖KG-*2〗-〖KG-*7〗0855. The moisture content in 0 〖KG-*2〗-〖KG-*7〗15 cm soil layer had less correlation with soil thickness, bu t the moisture content in 20〖KG-*2〗-〖KG-*7〗55 cm soil layer was significantl y correlated with soil thickness.

Key words: fish telemetry technique, surgical implantation, transmitter, surgical procedure, environmental factor, anthropogenic factor.