The sub-Himalayan foothill region is experiencing rapid land-use transformation over the last few decades resulting in the decay of several rivers such as Mahananda, Balason, Sahu, Rakti, Panchanai, Dharala, and Karala. A small rain-fed tributary of Teesta, Karala, has almost decayed in recent years but no notable assessment of its condition has been done to date. This study mainly aims to measure the intensity of human interventions and related responses of Karala through reach-wise, multiple indicator-based assessments. Initially, the reaches have been delineated by segmenting the river into 10 equidistant segments. Characterization of land-use and land-cover has been done for all such reaches. To determine the nature of hydro-geomorphology and water quality of the river 14 indicators are selected and categorized into 3 indices. According to the measured reach-wise mean (R_m), with the highest 4.70 (Reach 1) and lowest 2.21 (R9), it is clear that the need for restoration increases downstream since those areas portray massive deviation from least disturbed conditions (LDC). It is also revealed that the change in the bar area (ID7), vegetation condition (ID3), non-point sources of pollution (NPSP), and channel width (ID8) indicate also an alarming condition within the lower part of the river channel. It is evident that as the river approaches downstream, the natural state of landcover is lost due to intensive human intervention, mostly due to massive land-use transformation reflected in a 600% increase in built-up area in and around the Jalpaiguri region from 1990 to 2020. Hydrologically as well as ecologically sensitive rivers like Karala are the inseparable parts of the sub-Himalayan foothills. Degradation of such, due to, the human alteration would eventually disarrange the entire ecosystem. This easy-to-use, rapid, and coast effective methodology was found useful in distinguishing the extent of alterations by human intervention and the responses of such river systems.

在过去的几十年里，喜马拉雅山麓地区正在经历快速的土地利用转型，导致 Mahananda、Balason、Sahu、Rakti、Panchanai、Dharala 和 Karala 等几条河流的衰败。卡拉拉提斯塔的一条雨水灌溉的小支流近年来几乎已经腐烂，但迄今为止还没有对其状况进行过显着评估。本研究主要旨在通过基于范围的、基于多个指标的评估来衡量 Karala 的人类干预和相关反应的强度。最初，通过将河流分成 10 个等距段来划定河段。所有这些河段的土地利用和土地覆盖特征都已完成。为了确定河流水文地貌和水质的性质，选择了14个指标并分为3个指标。ř_米)，最高为 4.70 (Reach 1)，最低为 2.21 (R9)，很明显下游需要恢复，因为这些区域表现出与最少干扰条件 (LDC) 的巨大偏差。还显示，坝体面积（ID7）、植被状况（ID3）、面源污染（NPSP）和河道宽度（ID8）的变化也表明河道下部的情况令人担忧。 . 很明显，随着河流接近下游，土地覆盖的自然状态因密集的人类干预而消失，主要是由于大规模的土地利用转变，反映在自 1990 年以来贾尔派古里地区及其周围的建成区面积增加了 600%到 2020 年。像卡拉拉这样的水文和生态敏感河流是亚喜马拉雅山麓不可分割的部分。退化之类的，因此，人类的改变最终会扰乱整个生态系统。这种易于使用、快速且海岸有效的方法被发现有助于区分人为干预的变化程度和此类河流系统的响应。