Lakhish River

The Lakhish connects the western slopes of the Hebron Hills with the Mediterranean coast, passing through northern Ashdod before reaching the sea.[1][2] Its drainage basin covers approximately 1,020 square kilometers, and its principal tributaries are Nahal Barkai, Nahal Ha’ela, and Nahal Guvrin.[1] The basin drains the western side of the Judean Hills from the Gush Etzion area to Hebron.[3]

Most of the river is intermittent and dries during summer, while a wet section near Ashdod extends approximately 3.5 kilometers westward from Bnei Brit Bridge to the beach.[3] Only a few sections are spring-fed, and flash flows generally occur in winter.[1] At the Ashdod port-bridge monitoring station, the water includes both upstream flow and seawater entering beneath a permanent sand barrier at the river mouth.[1]

The watershed includes woodlands, nature reserves, national parks, and archaeological sites identified as potential settings for recreation and leisure.[2] Along the lower river, rehabilitation has combined improvements to water quality with landscaped public spaces, observation points, and picnic areas.[2]

The course of Nahal Lachish forms the northern boundary of the region examined in an archaeological study of Early Bronze Age I southwestern Canaan, extending to its discharge into the Mediterranean.[4] That study discusses excavated sites and pottery assemblages, including those of the Lachish NW settlement.[4] Modern Ashdod was founded in 1956 at the mouth of Naḥal Lachish.[5]

A British-built pillbox near Gesher Ad Halom preserves an earlier feature of the riverside landscape: it was constructed during the Arab riots of 1936–1939 as a guardpost protecting the railway.[6] A retrospective account by environmental campaigners described the river in the 1960s as perennial, with clear water used for recreation, fishing, and agriculture.[7] The campaigners linked its subsequent pollution to the development of Ashdod, nearby communities, and industries along its course, including wastewater carried by tributaries.[7]

An intensive restoration project began in 1991, after years in which sewage and waste in the river had troubled Ashdod residents.[2] Lachish-Ashdod Park opened in 1996, with the Jewish National Fund involved in its development as part of a project addressing the polluted, clogged river and nearby historic sites.[2][6] Riverbank stabilization incorporated different types of vegetation into the landscape.[2]

The Lakhish was among Israeli rivers included in cleanup and rehabilitation programs that depended partly on improvements to sewage treatment.[8] Regulations introduced in 1993 established minimum secondary-treatment standards for effluent, with higher treatment requirements for discharges into rivers.[8]

A further environmental campaign began in September 2006, led by Zalul.[9] By 2009, discussions with Ashdod officials addressed stricter enforcement, sewage-infrastructure and pumping-facility upgrades, and water-quality monitoring.[9] The initial boating arrangement described at that time was seasonal and supervised, required weekly testing, and prohibited boating during the rainy season.[9]

A later rehabilitation phase, described as beginning in 2005, received investment totaling tens of millions of shekels.[10] By 2020, the Health Ministry had approved the return of boating, and ten pedal boats operated along an approximately 1.5-kilometer route from near Park Etgarim toward the river mouth.[10]

During the 2010 monitoring period, water in the Lakhish came mainly from agricultural-field drainage, treated wastewater released when it was not required for irrigation at the end of the irrigation season, and sewage entering during malfunctions.[1] Potential sources reaching the river and its tributaries included the Beit Guvrin wastewater-treatment plant, drains from Kiryat Malakhi, a reservoir near Timorim, wastewater from Ein Tzurim, and drains from Ashdod.[1]

At Ad Halom Bridge, the river was dry during both 2010 sampling rounds because of construction work on a new interchange at Ashdod’s southern entrance.[1] Without those works, the station would have received surplus agricultural irrigation water and treated wastewater overflowing from the Timorim reservoirs when not needed for agriculture.[1] Treated wastewater was also sometimes released during rain to dilute it and reduce environmental damage.[1]

Conveying Ashdod’s wastewater to a treatment plant through a main collector substantially reduced sewage entering the river from city drainage pipes.[1] At the port-bridge station, redirecting sewage from an urban drain into a pipe leading to treatment significantly improved water quality, except when malfunctions occurred.[1] Nevertheless, industrial wastewater from Ashdod’s industrial zone, municipal sewage overflows, and wastewater from nearby communities remained documented pollution sources in 2009.[9]

In 2015, a burst pipe released raw sewage into the river in Ashdod for about ten hours.[11] Zalul reported large numbers of dead fish and maintained that the natural sand barrier near the estuary prevented the contamination from spreading into the Mediterranean.[11] A parallel sewage line had not been activated amid disagreements among the relevant bodies.[11] The Health Ministry warned against boating and fishing while contamination continued, and the Environmental Protection Ministry subsequently stated that sewage was no longer flowing.[11]

In January 2019, secondary-treated effluent from the Timorim reservoir entered Nahal Ha’ela, which drains into the Lakhish, and Ashdod’s beaches were also affected.[12] The Environmental Protection Ministry stated that the discharge lacked an authorization order and followed excessive pressure on the reservoir banks.[12] Its explanation linked strain on the treatment system to unusual industrial wastewater and treatment-plant malfunction, and it reported enforcement action against a factory discharging excessive salts.[12] Ashdod officials called for the discharge to stop, citing risks to public health, fish, and other wildlife; Be’er Tuvia Regional Council did not respond to a request for comment.[12]

A 2024 study covering the mouths of the Lakhish, Kishon, and Alexander rivers found PFOS and PFOA concentrations in sampled waters above the recreational-water maximum recommendation cited by the study.[13] The sampled sites also exceeded ecological toxicity benchmarks used elsewhere for fish, invertebrates, and frogs.[13] Among the three rivers, contamination was ranked highest in the Kishon, followed by the Lakhish and then the Alexander; no Lakhish-specific concentration was supplied in the published account.[13]

During the season’s first rain in October 2026, runoff carried debris, waste, and organic matter from the upper drainage basin into the lower river, reducing oxygen levels and threatening fish and other wildlife.[14] Ashdod response teams pumped 5,000 cubic meters of water into the river, activated an oxygenation system, and monitored water and oxygen levels for 48 hours.[14] Oxygen levels subsequently rose, and the intervention helped save hundreds of thousands of fish.[14]

Lachish-Ashdod Park provides grass areas, a 2.5-kilometer promenade, shady alcoves, observation points, and picnic sites beside the river.[2] The riverside walk includes tamarisk, cattails, reeds, castor-oil plants, and fruit trees, as well as a nature reserve for prickly white acacia.[6] The pillbox near Gesher Ad Halom is among the historic features associated with the route.[6]

Parts of the adjacent park have intentionally been left in a natural state, with bird-watching hides.[10] During an autumn migration season, a young flamingo appeared along the river near Ashdod; people assessing the sighting considered it likely to have become separated from its flock.[3] A municipal veterinarian and a Society for the Protection of Nature in Israel representative advised against feeding or capturing it unless it showed signs of distress, while small crustaceans in the river offered a potential food source.[3]

Boating has been tied to water-quality controls rather than unrestricted access: in 2020, water was being monitored every few days, with increased monitoring during boating operations.[10] Plans for rehabilitation beyond the urban park also identified recreation opportunities across different sections of the approximately 1,000-square-kilometer watershed, including its wooded areas, protected landscapes, and archaeological sites.[2]